So it looks to me like we currently miss a place to offer a package
like
Jenkins to stable users, but it would be nice to have one as I believe
there will be more packages in this situation in the future (even
though
we might not like this).
I do wonder a bit how much this is different from Iceweasel or Chromium
however: there we also ship new upstream releases to stay at a
supported
version (though the life-time for Jenkins seems even shorter). Of
course
this only works as long as no new dependencies are pulled in, or at
least stay at something managable.