But just because support has ended, doesn't mean copyright has expired. In fact, copyright statues are what allow Microsoft to do what it wishes with XP. Remember, it's their product, not ours. So if they had the technology to zap it from your machine and disallow you to run it, that should be legal, because they get to dictate HOW you use their product. You only use it under license. You never "own" a copy, or "own" the OS.
So it matters none what patches are or aren't released and on what, and repeat whatever about WEPOS and SMB and blah blah - none of that matters at all.