Red Hat introduced modules with RHEL8, meaning they can easily make available more up-to-date versions of software if necessary. It's still not bleeding edge, but eg. PostgreSQL 13 was released on 2020-09-24 and that's available with support in RHEL 8 as a module. Similarly, you have eg. PHP 8, Ruby 3.0 and other software released after RHEL 8's initial release.

Modules are much nicer to use than the previous software collection system because they actually replace the "original" package, so it's just a straight version upgrade without having to worry about fixing configuration files etc. if it's compatible.