Right? I’m surprised, too. I think the main reason they’re able to make so much progress because one of the main devs worked on either PCSX2 or RPCS3 so they already have experienced people on it.
But I think it’s also because of the PS4’s x86 architecture which makes it much easier to program for. Which also means it’s much easier to emulate.
But that’s just speculation on my end.

I wonder if they’re trying to run a custom OS on their vehicle, too.

It’s pretty solid. There are still hiccups every now and then, but almost every single game is in a playable state.

There was a video he did on a startup taxi service using self driving cars. Basically the entire thing was an advertisement for that company.
Then another Youtuber, Tom Nicholas, released a video about that a few months later and how it’s an issue. I’ll have to watch it again as I don’t remember what he specifically talks about.