yeah, words of encouragement can be great, but i don't think anybody at LetsEncrypt is in any doubt that Google is happy with the work they are doing.

also, i get the sense that getting wider adoption for FIDO outside of LetsEncrypt is a bit of a goal, so having a third-party announce support for FIDO without referring to it as "the LetsEncrypt protocol" is kind of a win for the FIDO people.