It's All Part of the Marketing Strategy (Score 1)

Microsoft has learned that features alone haven't been enough to persuade its users to move to newer OS versions, so they are giving the vulnerability angle a try:

"Hey, buy our newest product, we still fix those vulnerabilities. You do still care about the security of your data, don't you?"

I can't see why MS would choose to not support a product that many customers are willing to continue to pay for support for. The support charges should be gaged to cover support costs.