The recent realization by cities that these services are making traffic worse will induce more regulation which will make these services even less viable than they already are.
It may as well be trying to hold back the sea. They can do this in the short-term, but not forever.
ninjaedit: I'm in favor of this putting pressure on public transit for sure though. In SF its abhorrent how late/delayed MUNI can be...
[1] https://www.vox.com/the-goods/2019/8/6/20757593/uber-lyft-tr...