But I feel like the Lyft/Uber mode of transport is generally more spontaneously and is therefore generally more elastic. Sure, there are undoubtedly some inelastic use cases, like regular commutes, but there are also some very elastic use cases, like a ride home from the bar or a rescue from the rain. I am definitely interested to see how the breakdown of these different use cases turns out to be, but for me and my friends and peers in the SF Bay Area, the latter use case definitely dominates.
However, my sense is that for at least certain locations/demographics, that's probably changed with Uber/Lyft. I don't personally use them much but anecdotally a lot of people have started using them as an alternative to public transit or just because it's easier if they're going out for a night on the town. And I work with a lot of people for whom the reflex seems to be to pull out a smartphone anytime they need to go more than a few blocks while traveling. I expect those behaviors would change if the price suddenly went to 2X. (It also definitely makes a difference at the margins when renting cars and that's mostly a straightforward price calculation.)
They manage demand via surge pricing, I thought. So is it really elastic?
I believe you are onto something there. What did people do before Lyft/Uber? They walked more. They biked. They took public transportation. Maybe they drove themselves. Maybe they drove/carpooled with a friend. Maybe they took a good old fashioned taxi.
Faced with a price hike attempt, those options are again always on the table.