I don't think all data is too localized (I think badp made a good point here, knowing what patch 1.1 had can be important even long after that patch), but I'd like to address a single example you made:
Take for example Starcraft II. Each patch is changing the balance, making some builds totally unusable.
This has come up a couple times:
Not surprisingly you'll notice that I've been answering them. What might surprise you though, is that I've lobbied in the past to have them closed as "too localized" without any success.
Now some of these questions came after the patch, and are valid questions. For example:
But most of them are largely speculative; and while I appreciate the faith the community places in my speculation, I am still uncomfortable with these questions appearing before a patch has been released. There is no guarantee the data I've provided with be accurate or will continue to hold over time and even if I meticulously update the answers, there is no guarantee the data will be correct before the next patch comes out and changes everything. Very frequently we only know what the value of a patch was in hindsight.
So as to the OP's question, I think sometimes yes/sometimes no, but on this specific point, I'd rather we err on the side of NOT speculating. At least until the patch has been released.