I've been in tech since 2003 in some form or another, I'm right there with you in thinking XP feels recent. My daughter was 2 in 2018, so it's definitely felt super quick to me too.
ok so technically, the 2018 support was post wannacry? I want to say. I dont believe they totally supported it up until quite a few years prior to that.
Micro xp... I got that to run on a Intel 400mhz laptop with 32mb of mainboard soldered sdram chips. Nothing like a a operating system under 200mb installed with a GUI.