@kevin yeah, no easy solution to that one, especially since WMF decided that "Save" was also too confusing and leading newbies to putting things out publicly that they didn't intend to.[1] The concept of public drafts is unusual most other places on the Internet, but private drafts are not exactly workable in the MediaWiki/Wikimedia model either.
We do have an edit recovery feature[2], but it's off by default.[3]
1: https://phabricator.wikimedia.org/T131132
2: https://www.mediawiki.org/wiki/Help:Edit_Recovery
3: https://phabricator.wikimedia.org/T355548