I personally still consider XFS a very mature and reliable filesystem. Both in terms of utility programs and kernel implementation. If I remember correctly, it was ported to linux from SGI/Irix where it was used for decades. It also was the default fs for RedHat/centos for a long time, so it might still have stuck at many shops.
Heres my anecdotal datapoint on which I base my personal believe:
From about 10-6 years ago, when I was doing sysadmin-work at university building storage-systems from commodity parts for experimental bulk data, we first had a load of not-reliably working early raid/sata(?) adapters, and those made ext3 and reiserfs (I think...) oops the kernel when the on-disk structure went bad. Whereas XFS just put a "XFS: remounted FS readonly due to errors" in the kernel logfile. That experience made XFS my default filesystem up to recently when I started to switch to btrfs. (of course, we fixed the hardware-errors, too... :-) )
Also, from that time, I got to use xfsdump/xfsrestore for backups and storage of fs-images which not even once failed on me.
As a blithe, new-Linux user (3.5 years), I was bumfuzzled when I saw RHEL/CentOS 7 switched from ext4 to XFS, figuring it to be some young upstart stealing the crown from the king. Then I did some Googling and figured out that XFS is as old as ext2! I'm looking forward to discovering how tools like xfs* can make my life easier.
Heres my anecdotal datapoint on which I base my personal believe:
From about 10-6 years ago, when I was doing sysadmin-work at university building storage-systems from commodity parts for experimental bulk data, we first had a load of not-reliably working early raid/sata(?) adapters, and those made ext3 and reiserfs (I think...) oops the kernel when the on-disk structure went bad. Whereas XFS just put a "XFS: remounted FS readonly due to errors" in the kernel logfile. That experience made XFS my default filesystem up to recently when I started to switch to btrfs. (of course, we fixed the hardware-errors, too... :-) )
Also, from that time, I got to use xfsdump/xfsrestore for backups and storage of fs-images which not even once failed on me.