10 worlds would add even more overhead than your 10 components.
Pretty much everything can be accomplished with Scene Capture components, the multiple worlds just makes it nicer for them not to interact, but it doesn’t make anything faster. It would still be doing a separate deferred draw, resolve to RT and texture drawn to the screen in the viewport widget.
The editor supports multiple worlds, but I think only 1 game world, all other worlds are preview worlds. Why doesn’t the standalone engine support multiple worlds? No clue, kind of a framework team problem.