So much this.
I have lost so many hours writing newsletter sections due to an accidental browser swipe that refreshes the page/goes back, hitting Save instead of Apply, or something else, and hours of work are lost. I’ve started writing in a separate app, then copy/pasting, but there’s no way to “paste and match destination format,” so I have to write first then format later.
Ideally, I’d like to see autosave like the rest of WordPress, but I’d settle for an Ajax save when hitting “Apply” instead of having to remember to hit “Apply” then “Save”.
Please fix this!