@AlanMunn As long as a MiKTeX version is supported all avaialble packages can be updated – the same package resource is used
mirror.ctan.org/systems/win32/miktex/tm/packages Also MiKTeX internals are distributed as packages, the only difference is, that MiKTeX 2.8 does of course only download the ones with 2.8 in the name and vice versa. BTW for MT 2.8 the end of support time is near:
MiKTeX Releases, but oops, also for 2.9 it is not long anymore …