The project description reminded me of a project I saw years ago. I looked it up, and I'm pretty sure it was oxen, which is surprisingly still going, although their hub looks half-dead.

I was trying to figure out it's use-cases

Lore is a next-generation open source version control system maintained by Epic Games. Designed for unprecedented scalability—both in terms of data size and the size and distribution of teams and repositories—it is especially optimized for projects that combine code with large binary assets, such as those found in the games and entertainment industries.

Oh yeah this is solving a huge problem. Games struggle with versioning because of the limits in place of git.

Why is the Lore codebase itself five git repositories, not five Lore repositories?

This won't gain traction no matter how good it is because it isn't git.