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Sure it was. So is RHEL.

Embedded isn't limited to devices equal or less powerful / expensive than the Raspberry Pi.

Arista EOS is definitely CentOS Linux release 7.9.2009 (AltArch) based.

Even Windows was and is used substantially in embedded systems.

I know about that. This is a special edition for embedded though. But CentOS is news to me. CentOS was targeted for servers.