The times of large JBoss/Wildfly application servers that need to start for several minutes and block bulk of memory include: Quarkus to the past. The Open Source Framework developed by Red Hat has been optimized for cloud requirements and modern development processes. It is used productively in large and small projects and is "Battle-tested".
The Quarcus framework can use various projects in combination with other components: cloud or on-premise, API-focused or server-side web apps.
Java is widespread in the enterprise world for several reasons: It is long tested, there are already many well tested components that provide language type security and is not too low-level. However, the disadvantages were previously all long development cycles and sluggish application servers. Quarkus continues to offer the advantages of the previous Java world, but specifically addresses the problems and thus reduces the costs of development and operation.