I fly into a random city, say Denver.
I could start hunting around for a local taxi app, which may or may not work, may or may not have any cars
I could get in a waiting taxi at the airport, but then I run into issues with cash etc
I could use uber while I'm still collecting my bag and have a known car and known experience waiting for me
Sure, as I said they have a potential edge in service and people who frequently travel to new places. My point was just that it’s not a very big edge: most people are not traveling to new places all of the time and if there’s a big savings they’ll switch. That doesn’t mean that Uber is doomed, just that they’re not a Google/Facebook money printing machine where local competitors can pop up easily.