I’m waiting on a fender, a door, and a bottom trim, and I’m at about a month total in middle-of-nowhere Midwest. Luckily, I can drive the (heavily dented) car until parts come in, but if the car can’t be driven then you’re stuck with the rental your insurance provides.
Driving the insurance's rental is perfectly acceptable. When you're really screwed is if the thing breaks down on you, and you have to pay the rental fees out of pocket, along with the repairs.
> When you're really screwed is if the thing breaks down on you, and you have to pay the rental fees out of pocket,
Rental coverage is quickly exhausted waiting for Tesla to provide replacement parts.
Don't know about the US or whereever you live, but in Germany rental cars are only provided by the insurance for about two to four weeks. After that you'll have to pay them by yourself.
Can confirm, this is how it works in the US too, even with a top-notch provider (Commerce) with comprehensive coverage.