Yes that I think is a given if there should be any traction. The big question is: how do I (or how long until I can) create a repo like this at the various git

Yes that I think is a given if there should be any traction. The big question is: how do I (or how long until I can) create a repo like this at the various git providers. Because to a rounding error, people don't create or host their own git repos. They are hosted on github, devops, etc. Not because it's better or because it's hard to self-host a git repo but because it's convenient and more importantly because any self hosted git usually means giving up important features in integration with CI systems, Issue management and so on. Offering one thing (e.g. better monorepo support) is not going to fly very well if it means giving up N other things. At that point it's mostly a tech demo like early Git-LFS was until the full support was on Github.