Yep. Huge limitation of this approach is the assumption the code has always lived in the same VCS. I remember migrating a monorepo for geointelligence processin

Yep. Huge limitation of this approach is the assumption the code has always lived in the same VCS. I remember migrating a monorepo for geointelligence processing algorithms years back to multiple repos, and its own history was it had been in Mercurial before Git, ClearCase before Mercurial, and God knows what earlier than that. But I was reviewing old Fortran code for handling specific vehicle missions and could see from the mission codes that some of these were satellites launched in the late 80s, so the code itself had to be even older than that.