That's probably wise. I wish there was a way to add metadata to the subkeys. I want to have one set of subkeys for Proton Mail and another set for absolute privacy. I want to mark them as "leaked" keys somehow. Not quite revoked but close.

I read the OpenPGP standard and it seems to have some kind of "notation" packets. Seems to be somewhat related to metadata but I can't figure out how it works or even what its purpose is and it looks like nothing ever uses that anyway.