I'm dreading the next major thing that goes wrong too, now that the car is out of warranty and for the most part only Tesla can repair them.
They've stopped offering mobile service in my area (Northern Utah) and they've stopped offering loaner cars while performing repairs. Meaning dropping the car off and ruining someone else's morning so you can get a ride to work or home.
I love electric cars, I will never buy another gas car, but I will also never buy another Tesla.
But I’m currently waiting for a (minor, non-critical) service that has been pending for month. The (friendly! competent!) tech showed up once with the wrong part, because Tesla doesn’t have their mapping from VIN to supported parts done well enough to actually send technicians with the right part. Still waiting for a second try. (As far as I can tell, the part I need is quite basic and works with all Model S versions from inception to 2020. That doesn’t mean that Tesla can find the thing. If the part I needed were a roof shingle or a fancy diode or connector or something, I’d have a real problem.)