[user5994461]

Not true. Google, Facebook, Goldman Sachs and JP Morgan, all companies that run mono repos and predate git by very far.

Git cannot checkout sub directories and it slows down exponentially with the number of branches. It's the opposite of what is needed to run a mono repo in a large company.

[shados]

My wording must have been awful...because that's exactly what I was trying to say.

The big companies that predate git and such used monorepos because that was the norm at the time, and it was easier to do with the tools at the time, and as they scaled, they just scaled their process instead of changing everything. But several large tech companies, especially newer ones, do the multi repo approach.