why slack has spammy notifications

Notifications in Slack can't be gradual because any channels are a small amount of categories that are infinitely deep. DMs are likewise ambiguous. This is probably for two reasons:

  1. They want to keep their design "simple" (really simplistic) so that people don't get confused.
  2. Variable rewards And Dopamine allow more FOMO which drive engagement.

For a much more in depth breakdown see: The mystery in your inbox (Slack's notification V.S. Basecamp).

Links: Slack's Design

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