I don't see why we should not be able to use the edit function regardless of the age of the post. However, once people start replying to the post, then deleting or changing the post could cause problems.
I kind of agree with you, but I guess wiser heads have decided otherwise because, apparently, the editing function was being abused by people changing what they wrote and then claiming they never said the first version.
You're right about editing after replies are made because replies generally contain a quote of the original post, and editing the original post will not change the quoted portion found in a reply to the original. (Got all that?) I can remember editing an old post that had been replied to and then asking the author of the reply if they would be so kind as to delete the quote of my original post in their reply post - which proves that it didn't used to be this way.
WHEN did it change? Can SOMEONE please answer that for me? That's all I want to know. You KNOW how George obsesses on things . .