out of date distros?

yes, I have RPi with raspbian jessie and raspbian stretch too, but also run a Windows XP in a VM sometimes. Ubuntu trusty and xenial both ...

At the moment, everything I'm running is current, but I ran Fedora 12 for about 3 years past its EOL with various high-vulnerability things like Firefox updated with versions from other sources hammered somewhat unwillingly into place. Then RHEL 6 was released based on Fedora 12 and 13, so I was able to move to CentOS 6 and keep my system configuration and desktop environment pretty much intact. I'll be back in the same predicament when RHEL 6 goes EOL in 2020.

Not sure how to edit a poll. I suppose a "Mixed" option would be appropriate. Never considered more than one os in a given setup. I only run a single os across all my computers / containers (aside from the wifes windows computer) so I don't think about multiple os's.

I believe I still have some CentOS 5 servers running somewhere. And an OpenSuSE 12.something.