This is great news since it is a real concern for future and current owners and Tesla said this was a major focus for them in 2019. A Reddit user who happens to be part of a new Tesla collision certified shop, said the following:
«Now Tesla started a wholesale ordering system that gets us parts drop shipped at about the same speed as the German vehicles we traditionally repair. Part costs are also substantially less expensive for these vehicles versus their European rivals.»
And when he was asked about how hard or easy are Teslas to get repaired, he asnwered:
«Surprisingly, they are quite easy to work on compared to other aluminum high end cars. We also have an actual repair database for the vehicles now, which makes writing up the repair estimates as easy as any mass produced car.»
Honestly the thread is full of interesting comments posted by the original poster, I recommend you to read it.
Read more: Reddit