There's more to Non-Destructive Editing than just a fancy 'undo'. It allows you to go back later and adjust/refine/tweak the alterations you've made to each lay

There's more to Non-Destructive Editing than just a fancy 'undo'. It allows you to go back later and adjust/refine/tweak the alterations you've made to each layer in your image, individually. You would need to be saving dozens of copies as you went along, covering every possible permutation [number of layers x adjustments per player] to allow you the same freedom to re-adjust that non-destructive editing provides. Then, you'd have to keep all those multiple copies in case you ever needed to make adjustments to that image in the future. With non-destructive editing, you have one file which contains everything. It's not just a gimmick!