N of one and all that, but....
The key justification for me to spend over $72,000 total for our M3 was the safety factor for an 82 year old driver. We're not the RV type.
I'm greatly disappointed in the ride, however, but understand why that is so. This is a sports sedan, and our other car is a 2001 Lexus LS430 which is a bit quieter and much smoother ride (even though not air suspension which I wanted for the M3 but not yet available). The Lexus handles and drives well despite some compromises for comfort. Even though I'm not a particularly race-track type, despite a harsh bump on our poor local streets, the car's steering is far superior to the Lexus and I noticed driving from Rocklin pickup store to home (the first 30 or so miles) how adroitly I could move the car around slower moving vehicles, and cut ahead of them with ease—another potential safety factor for the aged. You get the feeling this beast has all four feet firmly planted on the pavement and ready to move anywhere with "the guickness" and precision.
Not at all regretting the purchase. My wife wants to keep the Lexus; I don't. We'll soon have to visit progeny in Santa Rosa when I will have enough courage to try autopilot. The review of V9 by the AI guy is a mindblower. Really look forward to installation of the new chip to handle such greater input, split screens, etc.