On one hand GW is actually moving the 40K story forward and appears to be listening in fits and starts, such as bringing out the primarchs, to the point that the eighth edition rumors of being actually a good ruleset and trying to add smaller scale games back in could actually be true.
On the other hand, GW.
If friends and family ever gets together to play Fantasy or 40k (we have almost 2 dozen armies all-in) then we just use the version of the rules that are the most enjoyable. Way too many odd or backwards changes over the years to bother with.
Wasn't GW rehashing the rules in each codex so that certain models were now useless and players had to buy more?