User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-40233642-20210104151643/@comment-1038387-20210104201854

You guessed wrong. It's a new product, the code won't have bloated much, if at all.

I'm not sure why they decided on the 24 hour limit. It's a reasonable time to fix typos, and short enough to prevent massive changes after there've been replies, thus changing the conversation. With the old comments, you could still see the old version. Infinite editing and edit histories is a feature of wikis, but not everywhere else.