We use mercurial in our startup and if need to use git, we keep a mirror of git repository in our kallithea instance. We integrate git in our internal workflow

We use mercurial in our startup and if need to use git, we keep a mirror of git repository in our kallithea instance. We integrate git in our internal workflow using hg-git. Not sure of others but in the early years we chose mercurial over git due to to its beautiful command line UI, conceptual integrity and easier mental model. Even today hg is easier to pick up for new developers in our startup compared to git, even though git has bigger mindshare due to GitHub. In hg specially like the default setting for immutable commit history and explicit merges unless forcibly overridden.