Not that I like walled gardens, but I do think that once you open up the door, many quality titles will skip the store which otherwise would have listed. So the

Not that I like walled gardens, but I do think that once you open up the door, many quality titles will skip the store which otherwise would have listed. So the garden is now incomplete. You haven't just given access to the things you previously blocked. Now some users will need to venture outside to find apps that otherwise would have been in the app store.