Xfs is basically a bigger, better ext4.

It has more features but it also isn’t as weird and wacky as btrfs and zfs.

Honestly I’m not sure it shouldn’t be the default fs for most distros, except it wasn’t born in the Linux kernel like ext and btrfs, but it’s been here forever and it’s been very well behaved, unlike others I can mention.

Used it for a while on lvm raid, xfs was never what gave me problems.