Being in the commercial software development business myself, I can attest to the fact that it makes little business sense to support the older versions of the software. We are constantly encouraging customers to upgrade to our latest version, that way our development teams can focus on fixing issues in only a few code bases, not everything we ever sold. This frees up resources for development of better functionality and staying up with the latest technologies.

Companies have limited resources and have to decide how best to apply those resources not only to increase profits, but usually just to stay in business in a competitive environment. Just because MS is huge does not mean that they do not face the same kind of pressures that the rest of us do in the software business.

So excpecing MS to update older versions of their OS does not make sense to me.