The small amout of time I spent with JavaFX was productive, I wish it was more popular. It was a viable alternative to QT for cross platform desktop GUI apps, but I do get a feeling that its future is uncertain with it getting unbundled from the Oracle JDK. I don't really get why AWT and Swing get to be first class citizens of "core" Java while JavaFX which is the best approach to build GUIs in Java cannot be.