(No provocation)
I see these reasons:
- newbie
- lazy (don’t wanna edit config files etc.)
- unique features (like assistant/toolbox, some optimizations like in cachyos)
- wanna check how different systems are set up (that’s rather distrohopping)
Personally, I used manjaro i3 when I was beigginer and wanted to see how tiling WM should be configured (check out ranger config, for example). But after some time, I don’t see reasons why not to just customize pure arch (same with debian and debian-based distros).


I used to use Arch, but I dropped it for CachyOS sometime last year. Cachy is just slightly faster for gaming for me, and since that’s my biggest use, there was no really compelling reason why I shouldn’t use it instead of Arch. Same experience, slightly better performance while gaming, and no additional work to set up. It’s just win after win.
FWIW, you could install CachyOS’s kernel on Gentoo. It exists as a package.