Im also running a pi4 with docker containers but also my nextcloud instance. Been feeling it’s a bit sluggish at times so I recently ordered a cheap optiplex micro, and some upgrades for the ram, ssd and cpu. The pi4 will only be used for pi-hole now.

Those distos are for professional use cases mostly. Fedora is fine and there is no need to worry.

I’m all for using Debian and such, and I think out of all the new and hip things people brag about, using Flatpak is the most useful thing for the average user experience and worth checking out. Everything (almost) else is just extra.