Just as we’re finishing our deployment of 7.5, RHEL 7.6 β is now available. There are release notes. Section 41, Deprecated functionality, is interesting – they’re deprecating sendmail! Gasp! They also deprecate tcpwrappers but don’t explain how to replace it.
Edit: Matthew Richardson has alerted me to this Fedora page on deprecating tcpwrappers which gives some explanation. Thanks Matthew!