Sure, but even "only 80% of Google" in a monorepo is still bigger than the combined size of most everyone else's constellation of small repos. And the the separ

Sure, but even "only 80% of Google" in a monorepo is still bigger than the combined size of most everyone else's constellation of small repos. And the the separation of repos is based on deployment environment: Server, desktop, and smartphone, where code has almost no cross dependencies because the environments of software never communicate via internal channels.