A dashboard nobody opened, and the number we posted instead

Fourteen panels, opened three times in six months, replaced by one message a day in the channel people already read.

yesterday, checkout:
  requests      41,208   (+4% w/w)
  errors            18   (0.04%)
  p95              310ms  (+12ms w/w)
  slowest query    1.2s   orders.customer_id lookup

the dashboard still exists, for when one of these numbers
is wrong. it is a diagnostic tool, not a monitoring one.

A dashboard requires somebody to decide to look, which happens after a problem is already known. A daily figure in a channel gets read passively and builds an expectation, so the week the p95 moved by 80 ms three people noticed. Keeping the dashboard for diagnosis is the right split — it was never bad, it was just the wrong medium for noticing.