Currently our applications are running on Tomcat 5.5 using JDK 1.5. Our applications seem to work well; however, with so many people using JBOSS now, I wonder do we need to migrate to JBOSS too, especially now Tomcat is embedded in JBOSS. What are the benefits we can gain from migrating to JBOSS from Tomcat, giving that we are not using EJB in our applications?
If you are not using EJBs, then you really have no compelling reasons to move to JBoss. JBoss brings a number of additional J2EE services to the table (Stateless Session Beans, JMS), but if you are not using them, there is no need to introduce JBoss.