[freiheit]

Worst case is might have to also manually replace a few "release" and "logos" packages (which is what's involved now for switching from RHEL to CentOS or OracleLinux)...

More likely there'll be a simple script to swap from CentOS (or RHEL) to Rocky.. Or they could have a "rocky-release" package with `Obsoletes: centos-release, redhat-release` and a `yum install https://rockylinux.org/rocky-release-8.2-1.noarch.rpm ; yum upgrade` is all that'd be required to swap...

TL;DR: should be very easy, but there's minor variations in methods that I doubt are finalized.