A lot of these, but not all (JSX for example). And then you have to worry about support - caniuse is great help, but it gets very tiring. But to me the main be

A lot of these, but not all (JSX for example). And then you have to worry about support - caniuse is great help, but it gets very tiring. But to me the main benefit is something else. React & co. let you define the state and then rendering based on that. It is incredible what this means for code maintainability... Try it, it really is worth the effort.