Even if Apple allows third party stores or side loading, its portion is going to be negligible unless regulators force them to change the platform default store

Even if Apple allows third party stores or side loading, its portion is going to be negligible unless regulators force them to change the platform default store (which is not going to happen for a while). The only meaningful competitor in the current era is the Play Store but those duopoly effectively maintain non-aggression pact so they won't likely launch it on iOS. Yeah, finally some hackers may have fun on iOS, but I doubt if this will transform the landscape. I think allowing third party browser engines actually has much broader, significant implications here; Apple is already making aggressive investments into Safari in order to keep its edge against Chromium based browsers. Hopefully, PWA will finally become a viable development platform, which may weaken this "app store" economy in a long run.