And why would that be Unthinkable?

Millions of Windows users have stuck with the "downgrade" of XP, over
Vista. ;-)

Latest is seldom the Greatest...and with Ubuntu's 6-month renumbering
cycle, those with the latest number OS, end up being beta testers.
They don't call it Beta software...but with the large numbers of
problems reported each update cycle, it obviously is not ready for
prime time upon each release date.

I know Ubuntu cultists will disagree, but it's the Truth.

A happy MEPIS 7 (Debian Etch) user, not suffering through the problems
reported with each new Ubuntu iteration,