> In fairness to GP, they said VCS, not Git

I did say VCS, but I also don't know what Git is missing in this relation.

> Other VCSes did support graph histories.

How does Git do not?

> Still, "3rd dimension" code reasoning (backwards in time) has never been merged well with code editing.

Maybe it's not perfect, but Git seems to do that just fine for my taste. What is missing there?