[rabidrat]

And millions of animal species occupying thousands of ecological niches are being replaced by 10 species across the planet: humans, the animals that humans eat, and the animals humans keep as pets. Even if the quantity of biomass is relatively constant, I think we can all agree that a planet with only humans and cows and chickens is a pretty bleak outcome.

[BurningFrog]

I expect the endgame here is the whole planet is a managed park. We'll still keep Yellowstone and Serengeti looking as is, but there won't be any true wilderness.

There is nothing unsustainable about this, but I agree that it is quite dull.