On: The following security updates require Ubuntu Pro ...

[robocat]

Oracle Linux: Free

Redhat Enterprise self-support: $349/annum “Can only be deployed on physical systems. Cannot be stacked with other subscriptions. Is not intended for production environments.”. Doesn’t come with 5 free installs! https://www.redhat.com/en/store/red-hat-enterprise-linux-ser...

SUSE: $799/annum with support. https://www.suse.com/shop/server/#subnav

[nubinetwork → robocat]

> Oracle Linux

I wouldn't trust Larry not to sue you for the pleasure of using their beloved products... Hard pass.

[jacooper → robocat]

Ubuntu pro offers support for Ubuntu universe, which is almost 20,000 packages.

None of the other distros you listed offer support for rpmfusion, which is the equivalent to Ubuntu universe.

If you don't use Ubuntu universe, you end up with just less support compared to the RHEL side.