They now have 2 viable CentOS 8.4 replacements

They now have

AlmaLinux 8.4 - Made by CloudLinux that CWP already supports the paid version of CloudLinux.
They also have experience rebuilding their version from RHEL.

and

Rocky Linux 8.4 (Just Released) - Made by the founder of CentOS

I've tested CWP on both.
Both also offer conversion for another CentOS 8.x based version to theirs.

Anyone else running either of these?

you should stick to cwp version for the best stability (at least for now)
http://wiki.centos-webpanel.com/the-future-of-centos-stream-with-cwp

I wouldn't recommend converting to CentOS Stream to anyone.

Stay on CentOS 8.4, yes.

Once you goto Stream with a server your are stuck there and can't go anywhere.

The migration scripts for AlmaLinux & Rocky Linux only work on RHEL Compatible Release versions.
So if are on Stream, you can't convert.

The migration scripts for AlmaLinux & Rocky Linux only work on RHEL Compatible Release versions.
So if are on Stream, you can't convert.

Do you mean a Live CWP machine running CentOS 8.4 can be converted to AlmaLinux or RockyLinux?
Or a CentOS 8.4 Stream CWP delayed repository is the only migration available / secure?

The migration scripts for AlmaLinux & Rocky Linux only work on RHEL Compatible Release versions.
So if are on Stream, you can't convert.

Do you mean a Live CWP machine running CentOS 8.4 can be converted to AlmaLinux or RockyLinux?
Or a CentOS 8.4 Stream CWP delayed repository is the only migration available / secure?

Left you an answer in the other area to this same question.