I maintain git-changelog, which is a similar implementation in Python (started two years before git-cliff). When I discovered git-cliff a few months ago, I was very impressed by the number of things they support. Also, being written in Rust, it must be much more performant than my Python implementation (which indeed has trouble with huge Git histories). I have started recommending git-cliff to some of my users who request features I don't yet support :)
Great work, git-cliff devs!