rollback to point based on regions (For premium and or at say 50-60 rep threshold)

Not sure of the feasability of this suggestion but I think it would be neat if there was a rollback to date feature based on regions or chunks in a region.

I realize that this if abused could possibly cause some server stress impacting every ones user experience, but if tied to a high level of rep and or made a premium feature this could be mitigated.
However there'd be some impact to world(canvas?) filesize issues as it would require sections to be saved to the server. Maybe restrict it to 1 a day or whatever works best.

But it would be quite handy, to pose a use case; Just say you are a beginner learning how to color, you have a sketchy but nice piece you'd like to attempt to color. However now you are posed with a slight dilemma. As it stands this site is somewhere in the middle of physical media and digital, there is a loose level of permanence to your work, you have undo but it's limited (as it should be for performance).
Essentially youd be posed with the quandry; Practice this potentially destructive technique or refrain.

I mean you could just start another from scratch but a limited rollback feature would be nice, could even provide an inti grief mesure, although regions can already be protected.



In short: A limited rollback feature based on regions.