From the Quarkus 2.5 Migration Guide

????Starting with Quarkus version 2.5, a user must choose the underlying JAX-RS engine.The RESTEasy Reactive extension has better performance than the RESTEasy Classic extension, so we will use that.

A new rule needs to be created: when the "quarkus-spring-web" artifact is present and the "quarkus-resteasy-reactive-jackson" is not, a hint must be shown indicating that the latter must be added.