My reasons are:
- I see differences in rendering between my Mac and PC
- Creating forms manually is much more painful than I would like
- It still feels to early to be using Java FX until proper tooling is available
- Concerns about whether Java FX will be supported once Oracle complete the purchase of Sun
- Java FX seems better at multimedia style websites rather than functional applications (in my opinion), i.e. Ext-JS provides what appears to be simpler form handling and validation.
I hope to return to the Java FX training in the future, when exactly - I'm not sure.
In the meantime, look out for blogs on JAX-RS, JPA and EXT-JS. I played briefly with Restful services in Spring v3, then thought it was a little painful and used the Netbeans wizards for generating my domain objects and services. It appears to look good so-far, but I'm sure I'm making things more difficult than they need to be.