Some are reading with great comprehension rates, most are skimming through content, and up to the..next piece.
Obviously, the internet has changed a lot since I was a kid, but I'm not entirely sure that there's just nobody being exposed to larger amounts of text and that few people online have interests greater than TikTok.
For me, there are some writings that are really great and some that are a drag. I typically skim to figure out if something is really great. If it looks good after a skim, I'll dig deep. I suspect many others are the same, though there probably are some junkies who never dig deep.