I think it is a good idea to go through old questions that have slipped through the cracks and flag them correctly. However, flagging them incorrectly as EOL only wastes your and the reviewers' time. If you are unsure whether a question can be considered as EOL at the time of its posting, consult https://wiki.ubuntu.com/Releases.

I think it is a good idea to go through old questions that have slipped through the cracks and flag them correctly, if they were EOL at the time. However, flagging them incorrectly as EOL only wastes your and the reviewers' time. If you are unsure whether a question can be considered as EOL at the time of its posting, consult https://wiki.ubuntu.com/Releases.