Forgive me if this has been answered before. Could the reason why the Enclave was in full force during FO3, be because they mastered cloning. I mean they are/were the most advanced faction in the wasteland. While everyone else was thrown back to the stone age, the enclave kept on progressing as if nothing happen. Which is why there technology is highly coveted by other factions. For example: ED-E in New Vegas was highly coveted by both the BOS and FOTA. And you know the BOS scribes were salivating in anticipation to tinker with their weapons and armor.
Going back to my original question. According to FO2 the Enclave shouldn't exist only as the Remnants they are portrayed as in New Vegas.
So I'm asking the experts. Was it ever explained either in game or by the developers themselves, as to why they had massive numbers in FO3? Could they have mastered cloning while they were hidden on the Oil Rig, and brought that knowledge with them to DC? Or am I just overthinking things and they were put there so people have something to shoot at.