Wow, that’s some difference… Browsers insist on making things blurry to the max when upscaling images for hi-res screens. Using a 2x srcset on images is like washing your glasses after forgetting to for a couple of weeks. “I can see!”
(Oh, yeah, still tinkering with the Emacs HTML book export thing. And I also remembered that when using random placement of things, one should make things look more random by actually making things less random — i.e. filtering out repeated similar values. So now things look even more chaotic. Mua ha ha! *twirls moustache*)