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(?)
  • On paper it was great, but in practice no one implemented it fully and while I don’t know why it is probably complicated.

    Jabber was the way to go 10+ years ago but than everything stopped since no one managed to make clients for voice and video chat, than we just all dropped it.

    I would call it big fail since it didn’t manage to materialize in usable form.

    On the other hand, it is never too late to make new better protocol based on xmmp for modern times.