I think those are unrelated dynamics. AI isn't causing people to use fewer apps. (Well, it might be, in a different way: you don't need the Yelp app if you can just ask ChatGPT where to get lunch.)
It's rather the case that AI makes it easier to build and publish an app, but not substantially easier to make a popular app that people will actually use.
It's rather the case that AI makes it easier to build and publish an app, but not substantially easier to make a popular app that people will actually use.