[reader_mode]

AFAIK there's a licensing tier for RHEL that gets you that - don't know how it compares to Ubuntu.

[mroche]

For RHEL Server (MSRP)

Self-Support: $350/yr Standard: $800/yr Premium: $1300/yr

Those are all starting points without including potential addons.

[Nullabillity]

Apparently the self-support edition isn't allowed to be ran on VMs. WTF?