Not sure if niche, but I use Arco Linux instead of the alternatives like Endeavour, Manjaro, or plain arch.
Why? Its easier to setup than straight Arch. Manjaro was all over the place when I tried it a few years back. Arco, right from the ISO stage, let’s you configure exactly what you want, with a handy guide on their website.
But the thing that keeps me loyal is the excellent community. The maintainer himself responds to most of your queries on telegram / discord (not FOSS reeee) and he’s very active on YouTube as well with no nonsense guides and walkthroughs. Shoutout Eric Dubois