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If you have to run an "Enterprise Linux", you are probably required by regulations or compliance to have a support agreement in place. Whether it's RedHat or Oracle or something else, security is going take third place to compliance and stability.

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Not necessarily. RHEL-clones are ubiquitous in high-performance computing. Clusters and super-computers are hard to setup, consist of hundreds or thousands of nodes, and are used by scientists who are not programmers by trade. The RHEL-clone model works well for them, as they can't expect their users to keep code up to date with changes in the OS, they are used by known, mostly-trusted users, and the systems they run on usually stay fixed their 5-10 year lifespan. Having a single supported OS for the entire lifetime of the system saves a lot of work.

Scientific Linux? Package availability and familiarity get you a long way.

Scientific Linux was an RHEL-clone, and they couldn't keep it going even with RH sources.

> In April 2019, it was announced that feature development for Scientific Linux would be discontinued

"regulations" or "compliance" aren't the only reasons to value stability. If you have a $2 billion facility or a $200 million piece of industrial equipment, you're going to place value on stability regardless of what the regulations say.

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