I wrote my blog's HTML[0] semantically, and I'm glad I did. I have a different style when someone fires up a new instance. I was already going for a retro "vaporwave" aesthetic there, and that recent Windows 93 post[2] pushed me over the edge. I apply those styles to my main site as an Easter egg when you view it in the Japanese locale.[1]
Semantic HTML also happens to work quite well on even the most anemic browsers! I am somewhat proud that a non-HTTPS version of my website (which is designed for modern browsers) is navigable and fairly usable on the original WorldWideWeb, aside from some of the <head> content poking through.