Stack Exchange was in read-only mode all yesterday afternoon Sydney time, at least between 2PM and 6PM AEDT October 30, which would be between 3AM and 7AM UTC October 30. The message I received when attempting to sign in indicates that the reason for this was planned maintenance:
I would expect to more find information on what maintenance was being done, and how long it might take, on Stack Status. However, during this entire time, Stack Status reported a big green tick and four small green ticks; it did not provide any confirmation that planned maintenance was occurring, nor did it provide any details of that maintenance nor an estimate of how long the maintenance might take.
Is the Stack Status system behaving as designed in this instance? Is the site being in read-only mode (due to maintenance) not considered to be an issue worth noting on Stack Status?