>>18589562they didn't then but all of them do now.
if you mean teleporting back to the 2000s and forcing them to look at the current internet, then they'd probably just be confused as fuck, like showing your senile grandpa the internet for the first time. show them 4cuck's /b/ and they might cry because of how enshittified it is. show them the sharty and soyspeak will give them an aneurysm because of how unfamiliar it is.
but if you mean now, the same niggas raiding habbo hotel and shit are unironic trannies or "trans allies" now. or they're fucking dead.
this is, of course, assuming that you're mostly talking about 4cuck and newgrounds types. the average internet user back then was not one of them. they were normies using shit like livejournal or myspace. most of those people were normies then and are normies now. they have kids and shit. those that don't are cringy quirk chungus cucklennials that probably do use shit like xitter, youtube shorts, and instagram reels. show it to them back then and they'd probably think it was totes awesomesauce, show it to them now and they just doomscroll the same way zoomers do.