I'm not really sure whether this is an answer, but for openSUSE the policy is that version that you get initially is the version that you keep for the life of the release, except
- if there are security issues
- if there are other major issues that absolutely need fixing
In general, I would guess that this amounts to one or two kernel updates over the 8 months that a version is the 'latest and greatest' and before it is superseded by a subsequent version.
This is not 'rolling release' and it isn't 'a new kernel has come out with new, cool, stuff, let's compile it and make the package available' - that's what a new release is for.