Google doesn't use Git, so their defense of a monorepo doesn't say anything about whether a monorepo is an abuse of Git. Your Twitter link defends monorepos in

Google doesn't use Git, so their defense of a monorepo doesn't say anything about whether a monorepo is an abuse of Git. Your Twitter link defends monorepos in principle but is very clear about how Git is not designed to handle monorepos well. This seems to support the thesis that a monorepo is an abuse of Git.