I am very picky about how I phrase myself and will often read, reread, edit, reread, and edit again continuously despite being happy with each revision upon submission, though often only briefly, until reaching a point of genuine satisfaction.
I often feel rushed to submit my changes for fear of exceeding the 5 minute limit for editing my own comment, which I feel discourages revision. I have on more than one occasion ended up deleting a comment just to repost it again with a new revision; though I only do this around the time of the original post, not some considerable time later.
One might argue that I should take as much time as needed before the initial submission but despite taking all of the time I need before hand, I still find myself meticulously editing, re-reading answers, considering my response, rephrasing for clarity, etc.
I don't know how others feel on the subject but I would be much more comfortable if instead of having only 5 minutes since the time it was created to have 5 minutes since the last edit was made. This way if I decide to change it after 4 minutes then I will get another 5 minutes to consider the entire revision.
I've received a lot of down-votes without comments which I can only assume is from those who believe this to be a non-issue related to proofreading with bias towards personal indifference. I'm not proposing this feature because I'm too lazy to read my submissions. I'm doing it because I spend time an excess considering and reconsidering for the tremendous value I put upon the clarity of my words.
This request isn't just for myself but also for the rest of us who care enough about the quality of our writing to spend the additional time continuing to ponder them even after submission.