This is my stance on things. When creating my reporting thread that wasn't primarily kept on the forum drafts, and I only used it to preview it to find any formatting issues.
Yes, this is an additional point. You cannot format your post properly using an external editor, as tables, quotes, links, etc may work slightly different here than in your editor which cannot generate previews.
Since we barely use the drafts then I think we don't have to issue any development about drafts.
It is the other way around. People don't use it because it is poorly designed and doesn't fit user's needs.
Each time you click "Preview", a new draft is saved. That means you'll quickly reach 100, my oldest draft is often barely a day old (meaning 100 new ones were saved in a day).
As a result, I barely use the draft page indeed, unless I want to find back something that I accidentally didn't post yet.
Yes, this is the case to me. I only use the draft page by accident. If my browser crashed I can recover my post. But that shouldn't be the only use of the drafts page.