It's a relatively classic invention, take something that exists and repackage. A snapshot and a log replay accomplishes something pretty similar. AWS slapped a ui and some orchestration around it. The cloud lock stuff makes sense (although if having an easy "undo button" on your db layer is mission critical to your business you might have other interesteting challenges.
That's not correct. We made a change to mark portions of our log-structured storage as though they should not have occurred. It is a totally different approach than point-in-time restore.
