Here's a potential solution to this mess. We treat app store placement like it's a free resource right now since it doesn't take up any physical space. However, it does increase its users cognitive load. All apps that have ever been produced sit on the app store unless their creators explicitly choose to take them down. That's like a department store that houses every invention ever made no matter how antiquated or outdated. Apple could introduce a "property tax". If you want to take up shelf space, you've got to pay a yearly tax or make way for other apps that will more productively use that space.