"It would also constrain the various competing solutions to all conform to the git standard. " That's already more-or-less the case. Gitlab refuses to add Hg s

"It would also constrain the various competing solutions to all conform to the git standard. " That's already more-or-less the case. Gitlab refuses to add Hg support because they pretty much hardcoded their platform around Git and don't want to abstract that away. Github doesn't support Hg. And in August, Bitbucket permanently disabled their Hg support too. Personally, I want to see Git die. But you're talking about pantomime portability here.