I thought the goal was L5?
Also what do you mean by "generalized L4"? L4 is autonomous driving but limited in when or where it can be used, such as geofencing, weather restricted etc... So do you mean generalized in the sense that it is vision-only with no HD maps but L4 because it will be limited? Are you saying Tesla will limit when or where we can use FSD because that is what L4 implies?
I cannot speak for powertoold, but to me, "generalized L4" would mean L4 with very broad ODD. Perhaps limited to well-maintained roads and excluding extreme weather. "Generalized L4" would suggest to me an autonomous car that people all around the country could buy, and most of the time it would operate autonomously with only very rare calls for the driver to wake up and take over. As distinct from a robotaxi that only operates in a very limited area.
Even if Tesla has a reliable L5 robotaxi, I don't think it's a good idea to enable *all* routes / locations for the public. Just as people do stupid things with AP, they'll do stupid things with a L5 robotaxi. You can use your imagination here.
L5 by definition does not need to have any means for a human to operate it. It is by definition capable of driving anywhere (presumably anywhere a human might drive) so I cannot think of anything "stupid" a person might do with it that only involves getting from one place to another. The L5 car should be able to safely transport a person between any two points connected by adequate roads. Unless you mean it should avoid "undesirable" parts of town?
ETA: JHCCAZ beat me to it.