I'll assume all locations mentioned above have Uber/Lyft operating in
place. My experience evaluating said operations have shown approx
2/3rd of the "casual traffic" vehicles (non-work, non-government) are
either Uber or Lyft Ithis is off the top of my head, but I've kept
notes.) In the San Francisco Bay area, I stick pretty firm to the
2/3rd #.

(i.e., so much for the "sharing" economy.)

P.S.., I've never used either (never will.) But I have used Waze Rider
as well as Scoop. Both are actual Carpool "Sharing economy" apps.

P.P.S., my #'s are actual locations, actual times, actual dates
(entirely within San Francisco for now.)