I was surprised to see `xfs filesystem being remounted at [dir] supports timestamps until 2038` on a brand new Fedora install recently. Wonder what the hold up is.
I've been keeping tabs on that as well, long time Fedora user here.
I wish I could tell you! Usually this implies some sort of lacking stability; yet I don't recall any specific warnings when I was researching opting in.
There may be some insights on the upstream XFS/Red Hat mailing lists (most of the developers are there, IIRC)
I've replaced all of my old XFS filesystems to address this and haven't noticed any problems... but filesystem things can be subtle.
The XFS bigtime feature was "experimental" until 5.15, and is still disabled by default in mkfs.xfs. Filesystems with that enabled can't be mounted by older kernels which don't support it, and until 5.15 that causes a big fat "EXPERIMENTAL big timestamp feature in use. Use at your own risk!" warning.
