I was wondering about this myself, as i went to add some pics to a resto thread a couple of days later after i posted recently and found i couldn't, then i realised it must be a change made to the forum software or something like that.
I often used to go back and either correct typo errors i'd made in previous posts, or fix something i'd typed in a resto thread that after re-reading later on i thought didnt make sense or i hadn't explained clearly enough.
Its not a deal breaker for me either
i too just need to hit the correct keys or explain what im doing in a resto thread properly the first time!