Would love the ability to have my comment drafts saved for at least a short period of time. Other project tools (trello and basecamp) we utilize do a great job at handling this.
So far I've had numerous comments get lost due to accidentally triggering a feature or miscalculating an interaction. Most recently I had a multi paragraph comment evaporate before me when I attempted to drag and drop a file into said comment. Instead of hitting the drop zone, I accidentally hit the text input directly above it. This caused the image to open in the tab. I quickly hit the back button, but it was too late. My comment had passed. (sad panda)
Shipped? Hmm... digging into this it looks like there is autosave for requirement and to-do comments, but for the main comment thread of the feature it doesn't work.