Right now it wouldn't surprise me if a lot of Uber inertia was specifically because their competitors are smaller and more localized.

I live in NYC, and there are half-dozen major rideshare apps here in some form - but I often travel to places where, if there is any major service operating there at all, its Uber... maybe Lyft, but certainly not Via or Juno or Gett or any other smaller names.

I don't want to load my phone up with a bunch of different apps and give my data to a bunch of different companies, so guess which app I use even at home where I have plenty of options? Uber. The barrier to entry of getting a new local competitor up and running is small, but the convenience of being able to stick with one provider no matter where you are is big.

I never ride Uber at home but there are some places where it's so entrenched (e.g. Mexico) that there are no real competitor apps. On the other hand, I've gotten better deals there from taxis and they've been more reliable. You can often look up a ride on Uber and negotiate with a taxi driver right then and there. If you don't speak Spanish, though...