By the way, I am reading and replying not using desktop, but using Android phone :-)

But you are right -- modern desktops are using a GPU heavily. For worse or best(10-15 years ago everything worked without GPU help and compositors. Was not as fancy looking).

P.S. I like how HN works on mobile. And how lightweight it is. Made by real hacker wizards, of long lost arcane knowledge of the webcraft!