If you want to, you can always set 'delay' in your profile to the number of minutes (up to 10) that you would like your comments to be visible only to you. This puts the stealth back in stealth editing. https://news.ycombinator.com/newsfaq.html

I rely heavily on this because it's somehow only after the comment is 'real' (i.e. staring back at me from a real HN thread) that I notice most of the edits I want to make.