Venator

It's also probably to make things slightly simpler from a legal perspective.

USB headphones?

using a thicker gauge wire shouldn't cause any issues, only thinner

There's plenty of aftermarket head units that offer all the best features of modern infotainment. E.g.
https://www.youtube.com/watch?v=hghWr1_UwqM

Or better - build it myself

That's called a kit car.

It's not from this?

Ommlette du frommage.

I thought it maxed out at 90 🤔 is there a console command to increase it more?

As a full stack developer I can assure you I can easily produce the result displayed in both those panels in the image 😏