A lot of us are being priced out of affordable vehicle ownership, but I'm not sure robotaxis (or ubers or any other sort of taxi) are a practical solution either should vehicle non-ownership become widespread, especially during busy periods.
The old ways of dealerships having 100+ vehicles on the lot days were numbered anyway, cost of keeping that kind of inventory must have been massive. Personally, I'm not thrilled with a strictly build-to-order system either unless you can truly customize it...not just choose from one of a handful of packages. You know, be able to get the larger engine, "good" stereo, etc. without having to get a bunch of other crap you don't want. I, for one also like to be able to test-drive something before I commit to it...I have long legs and relatively few sedans are comfortable for me. Also nice to know ahead of time on ergonomics...ie-control placement, how intuitive things are (a big deal these days given how tech-y everything is), etc.
Hopefully things settle out somewhere in the middle.
Battery replacement is a PITA on most modern vehicles. Long gone are the days when it was right out in the open with a + cable, a - cable and some sort of hold-down.