[alexhornby]

yep both extended it and have versions that can work against GitHub/git servers.

sapling scm from meta has I think the best cli and VS code UX https://sapling-scm.com/

jj from google is also mercurial derived with very similar cli features like histedit and has support for deferring conflict resolution https://github.com/martinvonz/jj

[martinvonz]

To clarify, jj is not derived from Mercurial, but it's heavily inspired by it. The current DVCS solution at Google (called Fig) is based on Mercurial, however. But we're hoping to replace it by jj.