I suspect it's also a lot cheaper during model development. UI changes with physical buttons mean changing molds, screen-printed text, electrical connections, e

I suspect it's also a lot cheaper during model development. UI changes with physical buttons mean changing molds, screen-printed text, electrical connections, etc. With a touchscreen, you plan "touchscreen here" and the UI can be modified in software basically up to the point the first production car rolls off the line (and even after that, too).