Phil, I really want to like both our M3 and Tesla in general, but they're both really a mixed bag.
I'm in my late 50s and have knee, back, and hand joint pain. I wouldn't label myself "limited mobility" exactly, but I can see it on my horizon. I'd placed my deposit/reservation for a M3 back in Jun2017 -- right before I bought my RAV4 EV -- based on its specs and the promise of FSD: Fully Self Driving. At the time, I was commuting ~16k annually in Seattle traffic and the idea of reducing my personal involvement in that commute, combined with the outstanding class-leading specs of the M3, led me to think the M3 would be my first brand-new car, of the approx. eighty I've owned over the years.
By the time Tesla informed me, Nov2018, that I could now take delivery of the reserved vehicle, it was clear that FSD was not in place, not close. The RAV4 EV had been in our stable for over a year and I realized it would do until somebody got FSD really working. So, I wasn't in the market and I was going to cancel the reservation. However, my partner's vehicle was approaching 200k and he decided that the M3 would serve his needs -- he's always bought new, so this was no strain for him.
We took delivery in Dec2018. Due to his being able to WFH most of 2019, and then moving to WFH entirely in Feb2020, the M3 still has only 10k miles on it. I did drive it for around 1k miles when we first got it, and still use it occasionally when I need AWD or have a longer trip than is comfortable in the RAV4 EV sans CHAdeMO, so my opinions are informed by limited actual time behind the wheel.
Exterior door handles: difficult for me to operate. Others (specifically, commenters on Electrek) expressed the opinion that I was not qualified to operate a car if opening the door caused my hand pain. I don't know that that's a valid criteria, but I don't like the handles because sometimes my hand hurts when I try to push one side of the handle in order to pull the other side. IOW, it's a bad design. It also freezes in certain weather conditions. The workaround for handle freezing is to use the phone app to turn on the cabin heater for a while before you want to leave.
Interior door handles: electronically operated latches via a push button. The technique that some mfgrs use to decrease wind noise and lower Cd by creating a door window/frame interface in which the window must be lowered to allow the door to open . . . well, that's a system with failure designed into it. Knock on wood, we have not experienced a problem with it so far, but freezing weather and door controller system failures are well documented to lead to frame trim damage when the door is opened without the window lowering itself. Oh, and window squeegee freezes to the glass. See workaround for frozen door handle above.
HVAC: no heat pump. We've seen a huge range drop in cold (ie 20s & 30s) weather. If the
Leaf had a heat pump in 2013 . . .
Autopilot: scares the bejeezus out of me. I've used it a lot, and I'd really rather drive myself than have to have constant attention on its driving, ready to snatch the wheel. To be fair, it works fine on highways, but on secondary roads it'll dart into a left-turn lane suddenly, and you have no time to correct. It drives through potholes, no matter the severity. The line it takes through a curve does not inspire confidence.
Visibility: Good rearview camera but terrible physical sightlines. I back into our driveway and garage (my partner pulls in forward). I have had trouble getting it backed up nearly straight, when I can back my Sienna
with a trailer attached around the harder, curved part of our driveway. I suppose I could put in more practice, but the RAV4 has great sightlines, the Sienna almost as good, so maybe I'm spoiled?
Wipers: the automatic wipers don't work well. I mean, really not well. And you have to take your eyes off the road to turn them ON/OFF/change speed. No manual delay setting. I'm just east of Seattle. 'nuf said.
Controls: I can't get used to the lack of dedicated physical, analog buttons. What's especially bad is the multi-modal controls, where a steering wheel button or knob does different things depending upon which mode some other control is in. Many people have no problem with the M3 controls, and I have to assume that this is either a side effect of my reduced capacity to adapt to new things (age or temperament, I don't know) or bad UI. Maybe some of both.
Chassis: upper control arms fail much too often. So far, I've read that most have been replaced under warranty for noise or inability to perform an alignment due to slop.
Seating: too low for comfortable ingress/egress. The RAV4 is perfect for me. Where I have hit my head on the roof only once on the RAV4 when entering, I have a
very difficult time getting into the M3 without hitting my head on the roof, and I have to tuck my head down as far as I can to do it. And I'm 5'8"! My 5'6" partner complains about the same though to a lesser extent of course. The other issue is that the seat bottom is uncomfortable for me (40" waist) with the sides too high and leaving me feeling somewhat bruised on longer excursions. And this seems to be different on the driver's seat from the passenger seat; the latter pinches the backs of my upper thighs, while the driver's seat is more cramped toward my buttocks. In any event, they're both uncomfortable for me.
I don't like either of the interior color choices -- I detest black, and the white is too white, I prefer off-white, cream, tan. The one thing I really miss from my old '99 E300 was the beautiful interior.
[We had to have the turn sig switch replaced under warranty last year, they gave us a pre-facelift Model S loaner for a day, and I had some of the same issues with it.]
The Driver Profiles is excellent: the car reads which phone is in the drivers seat and adjusts the seat settings and some driver settings based on the "key" used to enter. I have my Driver settings to Chill (reduced accel pedal response: a "spongy" accel curve), Creep (mimic an automatic transmission when stopped), and Low Regeneration (lesser deceleration when removing foot from the accelerator). Partner prefers pretty much the opposite, and the Standard Regen makes for a jerky forward/backward movement when he drives, which triggers some nausea and discomfort when I'm a passenger. So I don't ride shotgun in the M3 much anymore.
[update Nov2020: Tesla has
apparently removed the Low Regen option in the UI for new M3s].
I don't give a fig about 0-60 in 4.2 (which is what ours will do, now that I bought the $2k acceleration upgrade for partner's birthday -- partner loves it) or top speed of 145. Neither tickle my pickle after the second or third time I've experienced it. Those just aren't things I need or want. And I guess those are big selling points for Tesla vehicles. I'm not their target demographic -- until FSD works and works well.
HTH
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Tesla . . . they've changed the industry, and are still pushing faster than anyone else. I really want to like the company. But! I do not own Tesla stock, though I'd have like to and was torn about deciding against years ago. He -- you know who -- just does too many public, stupid things, and has taken an anti-union stand that makes it too difficult for me to get fully on board. I do keep tabs on Tesla daily, though.