I'm not saying it's ridiculous. I'm just saying it's not going to happen. XP is dead. The Microsoft board has spoken.
Assuming you have a standard split of the demographic, it means that 1/4 of your income comes from people running XP.
But not 1/4 of Microsoft's customers. The people on XP stopped giving their money to the residents of Redmond many moons ago, and hence they no longer enjoy the support of Microsoft.