This was a lyft in Vegas a couple years back. Taking an autonomous one was more expensive, but I chose it for novelty. That was already on top of Lyft/Uber being more than taxis.

In my experience taxis now are cheaper than uber/lyft. Not autonomous, but coming home from the airport the trains weren’t running for maintenance or something, and an uber was 160 dollars. No joking, that’s how much - base. Taxi was about 50.