Mercurial Changeset Evolution is going to solve the "It's safest to let it stay ugly then" and "Send them a note, let 'em know you're changing history" problems

Mercurial Changeset Evolution is going to solve the "It's safest to let it stay ugly then" and "Send them a note, let 'em know you're changing history" problems. No more force pushes or lost data! The new version of history applies on top of the old version. Immutable data structures, flexible workflow.