[stormbrew]

It's been turned on by default on every ubuntu machine I've used/installed in the last few years. I believe that comes from debian [1].

So I don't think it's that unlikely that any given reader of this has it enabled, tbh.

[1] search for HashKnownHosts here: https://manpages.debian.org/jessie/openssh-client/ssh_config...

[throwaway2048]

Its the default in the openBSD openssh upstream, has been for years and years.

[jwilk]

Is it? https://man.openbsd.org/ssh_config#HashKnownHosts says "The default is no".