For fifteen years, every consumer platform optimized for one thing: time on app. They got it. And now there's nothing left to take.
The attention economy has reached its terminal stage — the one where growth stops coming from new users or new minutes and starts coming from cannibalizing the competition.
That's a different game. It rewards lock-in, identity, and exit costs more than it rewards content. Expect the next decade to feel less like a feed and more like a fortress.