Because our entire industry has fallen into the rut of "more tools"... rather than fixing the real issues that hold us back.

This is why I'm not motivated to build something better. I don't think anyone would care.

This tool is not for pure source code. It's for videogames. Videogame-specific VCS have been lacking much more than Git has, since the start. As others have said, the biggest problem is undiffable binary files.