When evaluating successors to CVS back in 2007, Mozilla chose Mercurial because it had better Windows support than git. 18 years later, Mozilla is now migrating from Mercurial to git.
I migrated from Hg to Git a few years back, only because BitBucket forced my hand and most of the hosted CI tools stared dropping support for Mercurial.
But I still prefer Hg over Git.