Personally I love the idea of being able to edit my support forum replies indefinitely, rather than just an hour after posting. Often an old support forum post may be providing obsolete advice, and it is not possible to edit it to alert users of that fact. Adding a new reply to the topic may not be helpful since there may be multiple pages of replies. I want to be able to edit my old replies and make use of that DEL button to mark up advice that should no longer be followed.

Another example is an FAQ topic that gets stuck to the forum. We may add a bunch of FAQs to that topic and then in a month another question gets frequently asked. Currently we have to unstick the first topic and then create a new one that copies all the old questions and adds the new ones in a brand new support topic that then gets stuck to the forum. Having the ability to edit old topics will solve this problem.

Maybe there also should be a way for users to level-up to obtain the privileges of editing their topics at any time. If a user has a long history of being a responsible forum participant, they would be more trustworthy of that power. Brand new users should perhaps have a trial period where they have only have an hour window to make edits, and after that, allow them to edit