Comment by gmueckl
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.
I use it every day!