I know there's already a similar question. But things have changed recently since now you can even see how many times someone has edited his comment.
Maybe it is not best-practise, but i often post my first idea as comment. So either something that might help OP to find the reason for his issue or how he can improve his question. Then, few seconds later, i recognize details and i'm editing my comment. Then i recognize typos and i'm going to correct them and so on.
So sometimes i've edited my comment multiple times in the five minutes. I'm not a native English speaker, so i need more time to write and correct my comments. I feel treated like a schoolboy with bad marks shown publicly.
So why not at least provide a grace period for comments and the edit-counter increases not until the period has expired?
Here's a screenshot from the pencil i mean: