I thought about plone-site package

[Mihamina (R12y) Rakotomandimby]

Hi all
As well as there are (or have been) zope2.7, zope2.8, zope2.9, zope2.10, zope3 
packages, and as well as there is a probability of incompatibility between an 
existent plone 2.5 and a 3.0 site (I think of addon products, not in the 
default release) I think there should be a "separate" plone3-site package.
It's just my opinion, do someone share it?

I know it's easy to use the pinning functionality of apt, but why are there so 
many zope package then?