[freedomben]

This is purely anecdotal and could easily be PEBKAC, but I created a bunch of xz backups years ago and had to access them a couple of years later after a disc died. To my panicked surprise, when trying to unpack them, I was informed that something was wrong (sorry at this point I don't remember what it was). I never did get it working. From that point on I went back to gzip and have not had a problem since. Yes xz packs efficiently, but a tight archive that doesn't inflate is worse than worthless to me.