Yes, I am 100% for this option, with also a safe back-step of recuperating the last png saving step in case of a sudden shutdown (power failure, temperature, or an iceberg floating through your window destroying your machine, that is of course, leaving your hard drive untouched...) so it can also be resumable.
I hope this is isn't much of a hassle for Ono to code, and hope he does include it someday.
