I used to have an E300 and an then an A6. They were refined, but I wouldn't say the build quality was any better than the M3P I have. They were a teeny bit quieter on the motorway at cruise speed, but clattery growly things when accelerating, and the handling was way, way worse than the Tesla. Others don't like the 'vegan leather', but I find it softer and more pliant than the leather in both the cars, and the seats are waaaay more supportive.
Tyres - as others have said, your perception of risk, and the hazards of the environment will drive your perception of severity. In the beforetimes, I drove plenty, have never had a puncture, or let it bother me. In fact, the last puncture I had in ~60k miles motoring was in my E300 years ago (nail in inner-city car park). That I had to refill with tyre jollop, which made a right mess, took ages and only held pressure for a short while. Just buy a puncture kit, or buy w eheel and secure it in the boot.
Service - I live in Bristol, so don't have your geographical challenge. I have had the Ranger come to my house a couple of times for condensation in lights and a non-functional 3-pin charger. Nothing serious whatsoever, and in both cases the Ranger came to me. After that, you don't need a service, so even if you don't get a niggle or two when you get it, your whole-life faff will be vastly reduced, compared to legacy auto.
What I can tell you that the Tesla is more fun to drive, more responsive to my needs, more comfortable and cheaper than any of the previous cars.
Go for that test drive.