That's an aesthetic judgement. A site doesn't have to "look" fun to be fun. It just has to present the content that the author, or audience, find engaging.
An all-singing all-dancing website may well not be any kind of fun at all; a brutalist HTML 3.2 page might actually have something interesting written on it.
This right here. This here is why I visit this site, a bunch of other old sites, and use frontends for some modern social media sites.
The recent trend of redesigning almost everything is insane. "Modern redesigns" that uses widescreen screens less efficiently than the old design used a 1024x768 display.
No I don't care if it "looks old", if it functions good for me then I'll use it.