I work on a product for building user interfaces for hardware devices. All the state management is done via incrementally updated, differential DataFlow systems. The interface is defined in code instead of graphically, but I think that's a feature, so that code can be version controlled.
I think there has been evolution in the underlying data computation side of things, but there are still unsolved questions about 'visibility' of graphical node based approaches. A node based editor is easy to write with, hard to read with.