"....and new Windows editions are expected to come at least annually."
They keep selling the same shit over and over....since people want whatever is "the latest".
At my day gig, I have no option on what I can use...though I was literally the last guy to keep a a couple of running XP systems on our network. I had exceptions in place for several years, back when we first went to Vista (what a pile of shit that was)....so finally when we dropped Vista and moved to Win7, everyone was told to remove the XP boxes, but I managed to string the XP exceptions out for another year
until finally they told me I had to remove the XP boxes off the network permanently, about two months ago. Now we're running Win7 and Win8 is coming.
On my DAW box and two home Internet laptops (like the one I'm using to type this)....I'm still running XP, though I may opt to go to Win7 soon just because of the patching/secruity needs... since they are on the Internet.
My offline DAW box will stay on XP for a looooooooooong time. I also have my older DAW box with W2K on it, and that thing still runs fine, and it too was stripped down for offline use. Never patched/upgraded either of my two DAW boxes.
I only switched from the W2K box to the XP system because I was looking at newer audio apps/plug that needed at least XP to run, but now I'm all caught up with that stuff, and happy to keep this
my status quo for a long time.