Nothing only the author could say
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Rule · bucket: judgment · severity: warning · detector: none · since: v0.23.0
Section: UI writing
Group: Long-form

Forbidden:
  "The migration was challenging, but the team learned valuable lessons."

Instead:
  "The migration looked like a weekend's work. It took three weeks, because two services wrote the same table and nobody had written that down."

A post worth reading holds something the reader could not have written themselves: a case, a number, a mistake, a decision and its reason.