That was ambiguously phrased. The point I was trying to make here is that we don't have the situation that is very common for open-source projects, where a project might nominally have a 100 contributors, but in reality it's one person doing 95% of the changes.

LLVM of course has plenty of contributors that only ever landed one change, but the thing that matters for project health is that that the group of "top contributors" is fairly large.

(And yes, this does differ by subproject, e.g. lld is an example of a subproject where one contributor is more active than everyone else combined.)

There may be a difference of degree here, but not a difference of kind.