Ran into an issue where I needed a notes history a few times now so I figured I would see if there was any information regarding this. Being a former evernote and note plan user, this was a feature I came to rely on but was sadly dissapointed when I realized it was not possible.
It would be very much appreciated if this were a feature coming soon, it is one of those things that you hope you never need to use but are thankful beyond measure when you do need it and it is there.