Not limited to BMW. I have owned and rented cars from many different marques and terrible software is a constant. Haven't tried Tesla, but people say it is better.

My biggest peeve is when the car has several different contexts for configuration and/or auth that have been layer on each other like mud deposits. The user meanwhile has no idea that's what happened. So for example the seat position can be saved by pressing a button. But also is saved in a driver profile when the vehicle is locked. And then that driver profile can be backed by a cloud account. There's no user feedback at all as to what and where the car stored your seat position and the driver is left bemused as to why the seat is where it is and how to have it in the right place.

Not limited, for sure. Many vendors are behaving this way. They should all be named and shunned.