[conradfr]

Also why not make editing available for n minutes? Perfect for typos.

[thomasahle]

That's probably an even better approach, though famous people may have a lot of engagements during that time.

Maybe just make editing work like deletion/repost: Remove all likes a retweets. Then after n minutes it becomes an unattractive thing to do.

[user-the-name]

Because if you immediately notice it, delete and repost works just as well.