Won't it still be useful to have access to content posted by educated and well-meaning people without a direct commercial intent? The ancient original filter (access from universities) is long gone, and both low-content posts (a minor problem), and intentionally intrusive, addictive, and deceptive content (the major problem) abound.

Hence the longing for the times when this was not yet the case, and the quest for places that still maintain these qualities. (These places are often intentionally hard to find from outside; see the dead forest hypothesis.)