Why can Scene's only be constructed on the UI thread?

[Mike Hearn]

>
> At e(fx)clipse we have an FXML to Java translator who removes all the
> reflection overhead from FXML. It does not yet support all FXML features
> but we are steadily improving it and with test cases we are able to fix
> problems quite fast. Maybe this is an option for you?
>

That would be very interesting to try, yes please! Where can I find it? My
project is Java 8 based so that's no problem.