There's no code review system for Fossil, because the SQLite guy doesn't believe in formalized code review. It also doesn't have any good flow for accepting external contributions other than .patch/bundle files, because the SQLite guy doesn't believe anyone but him is good enough to regularly contribute code.

It might be great for single person projects, which I guess is fine for hobby stuff, but unless you luck out like Richard Hipp and manage to become a well-paid hermit working in a effectively-one-person cathedral model, then it's not really going to work for most projects.

Minimalist vps, download the executable, copy and paste apache config, activate and you are good to go. With certain providers you don't even need to buy a domain.

Personal, small and medium sized projects are 99% of all projects.

Fossil is great. I'd encourage anyone to try it out on their next personal project.