Continuing the discussion from A plugin for adding layout classes to post elements:
So this comes up every so often on Meta - a user creates a topic, some time passes, discussion resumes months later, now the user is no longer able to edit the OP. The current solution tends to be a moderator making the OP a wiki.
This solution works well here on Meta, and I’ve yet to see any issues with it. However, this solution is not ideal on other sites. Making the post a wiki allows any user to edit it. In the linked topic example, the post in question is the description of a plugin. If user A made a plugin, user C shouldn’t have the ability to edit the post, just so user A can do so.
Create staff feature to remove the edit time limit from an individual post. This would be located in the wrench menu just like wiki, and would simply allow the owner of the post to edit the post ignoring the edit time limit site setting. In the same manner, the button would then be used to re-enable the site-setting edit time limit.