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And from the user side, the search is basically unusable. It's almost like they forgot that the whole idea behind app stores was to be slightly more convenient than installing apps by downloading them from the developer's website. Same as Netflix forgot that its main selling point was to be slightly more convenient than piracy.
Yes, there's also the billing and the whole reach thing, but most apps are free and gain their user base thanks to the developer's own marketing efforts, so the app store itself is reduced to a fancy hosting service. So at this point, I don't understand why we as a society keep using them as the default way to distribute and download apps.