Some do, some don't. It's definitely a common thing in higher end cars, I just think it's probably over-extending for Tesla to implement this more complex system in a car that's supposed to be cheaper as well as their first real high-volume production vehicle.

Other decisions (single center screen, recessed air vents, lack of physical controls) all seem to be about simplicity and reducing parts in favor of software.

Frameless doors and window seals kind of goes against that in favor of fashion.

My VW CC has frameless windows that drop a centimeter when you unlock the doors. While I like the look, I think this increases road/wind noise.