I usually want to include a short edit summary for all of my edits. But I must confess, that I'm sometimes a little lazy and forget to enter a summary. This wasn't a problem, when I had less than 2000 reputation, because I was not allowed to finish editing without entering a summary. But now, with more than 2000 reputation, I'd really like to have a similar edit summary reminder as an optional feature.
Add an optional Edit Summary reminder for users with more than 2000 reputation. When one clicks on Save Edits, this reminder should kick in and tell the user, that he has not yet entered a meaningful summary. Users should be able to ignore this reminder and possibly disable it completely.
Optional improvement: Ideally this feature could be combined with a clickable list of predefined common edit summaries, as described in this feature request: Clickable edit summary options.
When one forgets to enter a summary, one can still change the default edit summary within the next 5 minutes by following this approach: Editing edit summaries.