[flockonus]

Having implemented the first two for a web game i absolutely guarantee you those are far from "nothing". It takes considerable diagraming & handling to coordinate FE + API on state changes.

If they in fact can solve that (haven't checked myself), it would be a massive time saving for development.

[Rohansi]

Maybe I'm just used to it having implemented it several times. But my point is that they require a relatively fixed amount of effort. Once it's implemented you shouldn't need to touch it again.