I’ll start:

  • RSS and blogs, news vs. social media
  • XMPP vs. WhatsApp/FB messenger/Snapchat
  • IRC vs. Matrix, Teams, Discord etc.
  • Forums vs. Social media, Reddit, Lemmy(?)
  • argv_minus_one@beehaw.org
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    2 years ago

    Undernet in its heyday supported tens of thousands of people. But yeah, a system that relays absolutely all messages to absolutely all nodes is going to fall over under the weight of billions of users.