message: Clarify a couple of ideas in the `ROADMAP`
diff: @@ -257,12 +257,14 @@ We could take a different approach, and keep some kind of state tree decoupled f
  Once the state lifetime of widgets is removed, we could keep them alive between iterations and even make `Application::view` take a non-mutable reference. This would also improve the end-user API, as it will not be necessary to constantly provide mutable state to widgets.
  +This is a big undertaking and introduces a new set of problems. We should research and consider the implications of this approach in detail before going for it.
  +
  ### Improve style definitions
  As of now, each widget defines its own styling options with methods, following the builder pattern.
  -A unified way of defining and reusing styles would be great. I am not proposing something like CSS, we should try to stay as type-safe and intuitive as possible.
  +A unified way of defining and reusing styles would be great. I think we must avoid replicating CSS, we should try to stay as type-safe, explicit, and intuitive as possible.
  -I think [`elm-ui`] could serve as an inspiration.
  +I think many different ideas in [`elm-ui`] could serve as an inspiration.
  [`elm-ui`]: https://www.youtube.com/watch?v=Ie-gqwSHQr0
  