I still remember the days when buttons were meant to look like buttons, and that was actually something we specifically aimed for and got [correctly] criticized on when we got it wrong.

Back when Skeuomorphism was in vogue, it was far easier to train users to use computing devices. These days you "just have to know."

And, no, it isn't just Tesla. All the major tech companies have given up on usability (e.g. remember when Microsoft had a usability research lab and improved the products using lessons learned?).