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Rocky Linux is a rebrand of RHEL which is essentially the LTS that Fedora feeds into.

On the desktop, newer kernel usually means more stable, although it becomes less true as the hardware running it ages.

On the Fedora side you can have CentOS Stream

That is the exact opposite of LTS.

CentOS-stream is a rolling release beta version of the next RHEL.

It is not rolling release in the sense that any distro that uses that phrase to describe itself is, and it is not a beta version either.

Centos stream has versions, and it does not automatically switch from one to the other. This is no different from Ubuntu LTS.

And I don't think their QA is any worse than that of Ubuntu.

Ask yourself this, by your definition, what would CentOS stream have to change to no longer be rolling release, and what would Ubuntu LTS have to change to become rolling release?

Then ask yourself the same question about the beta point, what would CentOS steam have to change to no longer be beta and what would Ubuntu LTS have to change to become a beta?