The Release Notes for EAP 7.2 has a section labeled:

"Chapter 3. Technology Preview"

https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.2/html-single/7.2.0_release_notes/index#technology_preview

However, the list of Tech Preview features here is incomplete - it is missing the feature to add/remove modules using the JBoss CLI which is only listed in the EAP 7.2 Configuration Guide. The Release Notes list should be complete so that customers do not have to dig through multiple documents to find out which features are not supported for production use.

https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.2/html/configuration_guide/overview_of_class_loading_and_modules