a video showing a chat with echo@nine.testrun.org bot which shows message delivery to be instant.

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   Delta Chat (delta@chaos.social)'s status on Monday, 20-Jan-2025 08:14:58 JST Delta Chat

   A main technical and economic difference to #matrix servers/clients:
   The family of #deltachat apps uses #chatmail servers as ephemeral message transports that know nothing and forget everything: Servers don't store group metadata or cryptographic identities
   and delete messages after download by default. In effect, a 30EUR/month #chatmail server with 10K's of active users hums along with 2% IO and CPU pressure, 1GB RAM and negligible disk usage. No Pro-version or Kybernetes needed to scale ;)