There's also the increasing number of weird controls for automatic transmissions. However, I think the last major difference in the basic controls of a car was

There's also the increasing number of weird controls for automatic transmissions. However, I think the last major difference in the basic controls of a car was automatic vs. traditional manual, and that seems to be resolving. I can imagine things that nobody seems to be doing - like what if you have a CVT, but manual control of the gear ratio through a lever with no detents?