I think it's orthogonal. "Monorepo" is a culture around having a single branch with a single lineage, and not developing anything in any isolation greater than

I think it's orthogonal. "Monorepo" is a culture around having a single branch with a single lineage, and not developing anything in any isolation greater than a single developer's workstation. I agree that Git is not very adequate for large monorepos, but I'd say that most open source projects are on Git, and most of them are trivial monorepos.