For a customer we still use Netbeans 8.2 because it has native support for Wildfly application servers. This is still not the case in Netbeans 11.1. It should be an improvement of Apache Netbeans if support for more application servers, e.g. Wildfly, is added. In future it is apparently neccessary to upgrade to higher IDE versions because of the needed support for JDK 9+ which is not the case in Netbeans 8.2.