It's nice and works well enough. However, I eventually switched to git, so that I may easily push to various remote publish repositories such as gitlab and git

It's nice and works well enough. However, I eventually switched to git, so that I may easily push to various remote publish repositories such as gitlab and github. It's a nice feature to have everything integrated into fossil (issue tracking, wiki, etc). However, it is also a drawback or waste when you actually want or need to integrate with existing infrastructure and diverse services providing those features. The world has standardized on git, and there's a whole ecosystem of tools and services developed around git. So unless you have a very specific and strong reason not to use git, it's hard to make a case for any other DVCS.