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Fedora CoreOS might be better in this regard since that is designed for server use case. Silverblue took that technology and applied to the desktop.

Silverblue user here. Haven't tried CoreOS myself.

What about Fedora IoT?

That seems to be geared towards edge servers and IoT use cases. Otherwise, all of them use the same technologies.

Also one thing to note is that CoreOS as well as IoT is bootstrappable with a configuration file via ignition(a tool for automation).