Latest estimate I could find is that in San Francisco alone, Lyft gives something like 170,000 rides. Every day.
People forget that California is a huge market. There's a reason why when California changes its emission standards for vehicles, large automakers don't just go "well, fuck you, I'm not going to sell cars in California." It's a market that is extremely painful to walk away from, and virtually no major company has done that (two exceptions, before someone "well actually"s me: Firearms companies and insurance companies. But those market segments are meaningfully different -- insurance companies were simply seeing a bad market given fires and earthquakes, and California wants firearm companies to not do business in the state).
I'll acknowledge that Uber and Lyft did threaten to leave the state right before Proposition 22 was passed, giving them legal cover to continue to treat their employees unfairly. I suspect they'll threaten to do that again. They will not. I ain't losing sleep over that.