Plus, I'd add that this is only an issue for apps with a high network effect.
For everything else I'd expect publisher's to just put their app in my favorite place, or risk me choosing something else.
For example im not going to install a new store just to get a note-taking app, unless that app was in some definitive way superior to all the others. (Which seems unlikely for a note taking app.)
Yes, exactly: new stores means much higher friction for consumers, so they're much more likely to choose an easier-to-install alternative unless there's something about that app that either requires them to use it (e.g. work) or its reputation is so much better.
So if it doesn’t affect apps with low stickiness, and the network effect will ensure that large publishers benefit from it, what’s the benefit for me as a user?
For everything else I'd expect publisher's to just put their app in my favorite place, or risk me choosing something else.
For example im not going to install a new store just to get a note-taking app, unless that app was in some definitive way superior to all the others. (Which seems unlikely for a note taking app.)