I’m pumped a search for hg+mercurial had hits in this thread. I am and will continue to be completely blown that hg lost the dvcs wars. It’s a better tool.
It is the unquestioningly better tool right now. It's available, stable, battle-tested and it's actively supported. It's a case of "being the change you want to see". Just use it. Claims that it lost are counterproductive. The implicit deterrence from those statements is what is actively keeping Mercurial's adoption low.
Hosting is available at least from Sourcehut and heptapod.host.
I'm running a private Heptapod instance (Gitlab fork with direct Mercurial support). It just works.
Modern scum (members of depraved modern culture) always prefer what is worse over what is better, so of course they prefer Git over Mercurial. Anyone who wants Mercurial hosting can use my hosting: https://hg.reactionary.software/