It’s just nostalgia applied to the internet. Some people call it Eternal September. Everyone prefers what the internet was when they first discovered it and hate what it’s become since then. I remember the internet from 1996 most fondly. Many prefer it from the 80s or earlier 90s. This is no different from other media: music, TV, movies.

Of course this is separate from the real issue which is the consolidation and silo-ification of the modern web.