I don't care about content/download size ratio, I care about content (quantity and quality) in absolute size. Download speeds have progressed faster than page bloat.
Wikipedia didn't exist in 1999 (not for years, and even Slashdot was barely more than a gossip site. Good quality discussion back then was on usenet or irc. The concept of a 'mooc' was just a wet dream of some 'cypherpunks' and 'technoanarchists'. Download a manual for your microwave or car, do online banking, email anyone but your hardcore nerd friends? Forget it. Price comparison shopping, ordering something from another continent? Lol. I remember riding my bike to a local bank branch to pick up foreign currency, which I stuffed into an envelope and snailmailed. Had to ask at the counter of the post office how much the postage was, because there was no way to look that up online.
Mp3? Sort of existed, you could download song by song from geocities pages; that was before the crackdown that led to Napster even. But the "selection" was minuscule, compared to today.
Oh and back then, when you wrote a site, you chose between supporting ie or netscape, or browser sniffing and serving two versions, or sticking to yhe lowest common denominator which wasn't much, to put it mildly. Ffs people won 'best of the web' awards for html that worked on two browsers and didn't look like crap! Like obscure competitions today where you build a file that is both a pdf and a jpg! My first job, back around that time, was to 'port' a website from ie to netscape.
The more I think about, the more convinced I get - any claim that it was better in those days is just rose-colored glasses.