It's very helpful for travel – e.g., I could use Ubereats even while I was in Japan, despite not knowing the language or which apps are good. And I'm much more likely to order delivery while traveling, since I can't cook.

I'm also not really sure what advantages there are to having 100+ local apps as opposed to a few national ones, there genuinely is a lot of infrastructure involved, and it's easier to push back against bad behavior on large companies (e.g. when PostMates was pocketing their drivers' tips.)