Lets get right to the meat and potatoes in this thread, with MS support ending in days, XP will be wholly updated by third party companies, if used ONLINE, or with any new hardware or software you're bound to have issues. For established software and hardware basis, I believe, like Windows 9x, there will be uses still available for decades to come, though increasingly archaic I'm sure!
Vintage game software, MAME emulation for example, and old titles will still need things like MS DOS and Windows 95 and 98 to run, if not in Emulation mode aka Compatibility mode of Windows itself.
How do you see yourself comping with the newly released from corporate ownership XP?
I just mentioned playing around with miniXP booting from a live source, no power, no more OS, but it's like Damn Tiny Linux as well! To have a gluten free OS you can't rely on the modern coded Operating Systems, they take up nearly 20GB of your HDD space! I should know, I ran into this exact issue!!