Yes your reading wrong, it crashed and even they say it's still vulnerable and suggest patching at a minimum. Honestly you fail to understand their point,and have no bussiness claiming your a security expert plain and simple,also your little tool would be just as effective on windows 10 except you'd also be able to use modern hardware and software, the fact is you have to take a drastic measures normally reserved for education or public kiosk type systems to secure your system, XP isn't secure your drive is there is actually a difference. Your copy can become infected but upon reboot your simply loading the os to it's clean state everytime and loading that into a virtual drive that is wiped. So no XP isn't secure.Yes My installation of Windows XP-SP2 is READ ONLY!
It is very easy to accomplish with "Driveshield"
As for XP sp2 not being vulnerable to wannacry.....
Yes, that is also true >
In fact, I was the person who first reported that XP-SP2 was unnafected by wannacry
And yes, I guess I do know more than them ?