My position is that anonymous conversation is low value and a more advanced internet society will not do it much. The "meaningful" social networks you theorize

My position is that anonymous conversation is low value and a more advanced internet society will not do it much. The "meaningful" social networks you theorize will be meaningful specifically because anonymous conversation is absent. If someone posts something interesting I'll DM them about it somehow because I'll know them well enough to do that. Replying on Twitter is the equivalent of sending Reply-All emails to the whole company.