Personally, I've always accepted the issue like this:
Krypton was an ancient civilization, once a big player in the galaxy, but long retired from the stage. They DID have colonies, offshoots, and whatnot, but due to their extreme age and cultural divergence, no longer considered those descendants "Kryptonian". It's like the Vulcans vs Romulans topic.
So. Krypton is in trouble, but Kryptonian society is merely too entrenched in their simultaneously enlightened and degenerated state. They could have left the planet easily, but were so utterly homogeneous nobody did. I also imagine the actual population of the planet wasn't big at that stage. As an elder super civilization there were no "ordinary folk". Everyone was basically the patriarch or matriarch of their own little Kryptonian dynasty, all services and infrastructure maintained by automation and super science.
So a sparsely populated planet of detached aristocracy... Add that into the notion that Rao suddenly goes foom without warning and well - it's actually not too silly to think there were "no more Kryptonians".
But being technical, there ARE plenty of Kryptonians throughout the galaxy - hell, maybe zillions of them. Tons of humanoids and human-like species, in one way or another descended from the ancient Kryptonian empire during its youthful expansionist days.
Krypton was an ancient civilization, once a big player in the galaxy, but long retired from the stage. They DID have colonies, offshoots, and whatnot, but due to their extreme age and cultural divergence, no longer considered those descendants "Kryptonian". It's like the Vulcans vs Romulans topic.
So. Krypton is in trouble, but Kryptonian society is merely too entrenched in their simultaneously enlightened and degenerated state. They could have left the planet easily, but were so utterly homogeneous nobody did. I also imagine the actual population of the planet wasn't big at that stage. As an elder super civilization there were no "ordinary folk". Everyone was basically the patriarch or matriarch of their own little Kryptonian dynasty, all services and infrastructure maintained by automation and super science.
So a sparsely populated planet of detached aristocracy... Add that into the notion that Rao suddenly goes foom without warning and well - it's actually not too silly to think there were "no more Kryptonians".
But being technical, there ARE plenty of Kryptonians throughout the galaxy - hell, maybe zillions of them. Tons of humanoids and human-like species, in one way or another descended from the ancient Kryptonian empire during its youthful expansionist days.