purescript-concur-streaming-poc VS purescript-concur-core

Another good solution is having orr return the remaining widgets. I know you suggested this in the past, and I did some work on it recently as a part of a rewrite of Concur - https://github.com/ajnsit/purescript-concur-streaming-poc. This is just a POC but seems to be going well so far. It also gets rid of Aff and Free monadic dependencies.

1. Application wide state is easy since you can always access state from parent components in child components. The problem occurs when you want to update parent state from child components.

Fortunately, you can make your own abstractions in Concur. For example, you can use a "Wire" - which lets multiple child components share and update parts of the parent's state (https://github.com/purescript-concur/purescript-concur-core/...). Note how this abstraction just uses the high level Concur API, and doesn't depend on the UI backend. With a wire the code might look something like this -

  -- A wire into parent's state, accessible using `with`, and updateable using `wire.send`

Have you looked at signals? AFAICT they are exactly what you are looking for. A signal is just Cofree widget (https://github.com/purescript-concur/purescript-concur-core/blob/master/src/Concur/Core/FRP.purs#L26).