[fstelzer]

I think one of the most compelling reasons of using ssh for signatures is the possibilies of ssh-agent and especially agent-forwarding which allow for incredibly portable workflows like ssh to a ci/build host/container to sign some production binary/container/tag.

Please note that these come with their own pitfalls and precautions you'll need to take to ensure your key's safety!

If you consider agent forwarding i'd recommend use of "ssh-add -c" to have your agent at least confirm every use of your private key. Generally for private key security i'd always use a hardware token. Modern yubikeys are really easy to use and you can even enable touch policy instead of the agent confirmation. The UX for this is still a bit lacking in the tooling though.