Apple wants to tax the routes you build around it.
Every system that becomes essential eventually discovers it can charge for the ability to bypass it. Apple isn't fighting Epic over whether external purchases should exist—they're fighting over whether they get to extract value from the fact that they do. The gatekeeping mechanism only works if you must pass through; the revenue model only works if you want to avoid it.
Intermediaries don't lose power when they're circumvented; they monetize the circumvention instead, turning attempted escape routes into new tollbooths.
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Apple's proposal reveals what happens when a platform becomes infrastructure: the company's survival instinct shifts from blocking alternatives to pricing them. The air traffic controller in the tower catches what radar misses—but Apple wants to charge every pilot who files a flight plan around the radar.
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This pattern will repeat wherever a single entity controls access. The next ten years will be defined not by which platforms survive, but by how many fees they can layer onto the workarounds people use to escape them.