Re: 646464
"These aren't even obscure distros either."
Debian Stretch for one. That's because they're Just Works rather than Only Just Works distros. They run versions which were sufficiently mature when the release was frozen. You can uninstall the standard version and install a more recent version if you like. Alternatively you can keep the standard version just in case and install a more recent one alongside. In Debian that goes into /opt. I've just removed 5.2 from this laptop having installed 6.1 alongside 6.0. Having 3 versions seemed like overkill.
Biting the hand that feeds IT
