Java 9.0.1 form Oracle is already available. Yet clients that have Java 1.8 are not automatically updated to Java 9. We have many users that consume Rich Html Dialogs (Java WebStart - ULC) with local Java installations on the Client. Is it save to migrate them to Java 9?

Java 9.0.1 form Oracle is already available. Yet clients that have Java 1.8 are not automatically updated to Java 9. We have many users that consume Rich Html Dialogs (Java WebStart - ULC) with local Java installations on the Client. Is it save to migrate them to Java 9?