Undo / redo is a nice to have? If you are building spa web front ends the right way these are essential. Using modals with OK/Cancel buttons to confirm actions

Undo / redo is a nice to have? If you are building spa web front ends the right way these are essential. Using modals with OK/Cancel buttons to confirm actions is not ok in a web app. It should work more like you are editing a document in a structured way hence undo becomes a requirement. Trying to undo in a web app where state is stored inside components becomes a nightmare. Redux makes this a heck of a lot easier.