300 GB is not the size of _the repository_. It's the size of the code base - the checked out tree of source, tests, build tools, etc - without history. It's c

300 GB is not the size of _the repository_. It's the size of the code base - the checked out tree of source, tests, build tools, etc - without history. It's certainly possible that somebody created a 1 TB source tree in Git, but what we've never heard of is somebody actually _using_ such a source tree, with 4000 or more developers, for their daily work in producing a product. I say this with some certainty because if somebody had succeeded, they would have needed to make similar changes to Git to be successful, though of course they could have kept such changes secret.