I guess I’m smart enough to install opensuse, but dumb enough that I somehow got slow pacman.
I kid you not, on my hardware zypper is the fastest between ubuntu apt, fedora dnf, and arch pacman. dnf was the second-fastest on my hardware, with apt and pacman being pretty sluggish
I’ve also used portage which was even slower, but probably not a fair comparison considering how much more complex it is.
RAID 5/6 aren’t yet recommended for general use on BTRFS by the developers.
Other than that I agree it should be suitable for anything, and an improvement over ext4 in some situations.
If you don’t know what RAID 5/6 is you are good.