[CentOS] about major version upgrades

On Tuesday, February 07, 2012 04:35:29 PM Les Mikesell wrote:
> If today's and
> yesterday's version of a language have to be different they were
> probably both wrong.

Like Python2.x versus 3.x?  Or even 2.4 versus 2.6?  Plone, for one, is still bundling older Python due to incompatibilities with Zope and newer Python.