git rebase -i lets you reorder commits easily, as long as they don’t have conflicts. If they do, you’re in for a rough time. I struggle to see how a vcs could help with that, even if I’d be happy to be proven wrong.

One cool tip to help with conflicts is the revert trick. If you have a conflict that you need resolved earlier in your commit chain, you can commit a cleanup that hides the conflict, revert it instantly and reorder the commits with interactive rebase to insert the revert first. It’s a bit hard to explain without an example, once you’ve tried it you will understand.