Krikkitone wrote:
(Ringworlds are somewhat different as their Ring structure gives them a unique ability to produce artificial gravity with nothing more than super strong Material)
Not really. A Dyson sphere (of the solid sort) can produce gravity the same way a ringworld would— by rotation. Of course the gravity would lessen with distance from the equator, but you still have more area than a Niven ring (counting areas of lesser, but acceptable gravity). And a Niven Ring would have (at 1 AU from the star) would have the absurd 3 million times the surface area of earth.
....
Actually destroying and rebuilding a planet as a
halo, or
orbital, could be a reasonably sized step up from planetary population levels.
Quote:
the Culture's Orbitals are approximately ten million kilometres in circumference and have widths varying between one thousand and six thousand kilometres, giving them a surface area of between 20 and 120 times that of the Earth.
Personally though, i don't like the idea of the ideal end-game being the destruction of all your unique planets— replaced with identical rings.