[Aqueous]

It's not applicable at all once you get beyond a few teams.

A mono-repo makes decisions for your teams.

[lunarcave]

I think Google, Meta, Microsoft, Twitter, Uber [1] and the thousands of engineers that these companies (and many other companies) employ, would disagree with you.

[1] https://en.wikipedia.org/wiki/Monorepo

[Aqueous]

Those companies largely made the decision for monorepos before there was tooling to support a proper multi-repo existence.