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There are many large organizations that pay for RHEL support. Supercomputers, for example. These organizations also benefited from being able to spin up analog installs of CentOS on local machines for testing. Not anymore. I expect RHEL's market dominance in these areas to diminish over time.

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HPC was always a tough sales area for Red Hat and RHEL.

In general, while RHEL is obviously still an important revenue source, there's also a lot of focus on OpenShift going forward which has done of pretty good job of covering (and more) inevitable RHEL declines moving forward.

All the HPC I've used in the past was always RHEL... I wouldn't have imagined it was a tough sales area for RedHat, at least in the past.

For testing environments Red Hat will literally give them free RHEL. Problem solved.

No, they won't. I'm talking about the users of HPC centers, not the maintainers. The supercomputer cluster is at NASA or DoE and running RHEL, but the user is some grad student in Caltech or whatever. The grad student needs the analog environment to run their code before their scheduled time on the big iron.

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