Thanks, that helped me to find an article or two. Tesla's solution looks... okay to me? Turn left, push left hand button on the steering wheel. Turn right, push right hand button on the steering wheel. Of course, this setup has a few fail cases the conventional solutions have not, but that is true for Tesla's steering yoke as a whole. Both seem to require more dexterity for no clear advantage, but they are also not the end of the world.

Personally I think it’s a bad idea. When the wheel is turned you can’t as easily keep track of how to signal left vs right.

Sure, most of the time you’re going straight when you need to use the turn signal, but not all the time.