I absolutely detest emacs' default undo behavior. I find it worse and more confusing than the normal simple stupid algorithm. With undo-tree, it becomes better

I absolutely detest emacs' default undo behavior. I find it worse and more confusing than the normal simple stupid algorithm. With undo-tree, it becomes better than normal, but only very marginally so. I use the linear undo and redo it provides every day but only go looking at the tree a few times a year.