if EXTx is stable, stick with it. pretty simple. what "they" won't tell you is that btrfs is simply EXTx plus the good ideas of reiser (now a chroot'ed jailed filesystem; pun intended......) included." xfs just has 20+ years of supercomputer behind it, and finally some long awaited updates for linux that give it both experience, and reliability that we need in our systems. btrfs just isn't there yet, and has not got the long track record to deal with it.
so, IMHO, which ain't so humble (
), EXTx or some other filesystem according to your choice and requirements. I find xfs to meet the speed needs, and performance requirements for MY uses. The toolsuite is mature and has a long track record. It wasn't invented at REDHAT, so it's not the default. pretty simple politics
EXT4 works very well for a default journalled filesystem on your desktop. It doesn't expand well into the 10+ terrabyte range without showing it's performance shortcomings. btrfs wishes to bridge the gap. not yet, as of my own stress testing 2 weeks ago.
Good luck of course.