Do you have any method for demonstrating 'truthfulness' in your statement (below) that you "can't ask them (users) to upgrade" from an obsolete version?
See OP. Most of those who runs linux have outdated version of Python, Ruby and Perl. And they used to use Perl, Ruby and Python software without upgrading all their stuff.
BTW and FWIW, the fact that RH says it will support 5.8 until 2017 for RHEL5 does NOT mean RH will cure the bugs
Yes, only security fixes are guaranteed. And they sometimes backport bugfixes.