E-bikes are a non-started due to theft problems. If you think coning of a robo-taxi is bad, have a few prowlers coming by every hour looking for a bike to poach, it is much worse for the e-bike crowd.

If you are going with taxis/ubers/personal transit anyways, I think autonomous makes a lot of sense. They basically allow you to optimize your road bandwidth if taken to an extreme level (which I'm sure more authoritarian countries with huge traffic problems will jump on). But you are right: the better answer is mass transit, for optimizing roadway bandwidth (and energy resources).

I for one look forward to a day where I can have my car drive us from Seattle to Yellowstone. I know I probably should have flown and rented a car onsite, it is really whimsical, but I want to try that at least once.