imho, especially in large tech orgs, every engineer is a 10x engineer for the right circumstances. But they're 1x engineers the rest of the time. But the whole reason to keep them around is you get the 10x performance when it's needed. Perhaps when a massive outage occurs

Any experienced dev at any org who knows how to deal with that particular pile of mess because it has been their job for at least half a decade is 10x developer.