> Some people avoid the first model year of any vehicle, to wait until all the bugs are ironed out.

Probably good advice.

> It's not clear whether that makes sense for Tesla which claims to do continuous improvement, and some of their improvements are actually downgrades in disguise.

Most of Tesla’s “continuous improvement” after the car has been purchased is via the software.

I will just say that I think the software has improved substantially since I got my model y two years ago.