It would be fantastic if this supported email and calendar providers that weren't Google. Supporting protocols like IMAP or JMAP alongside CalDav would be a fantastic step, as well as open source note-taking apps like Hyprnote would be neat.

Does anyone use JMAP? I know it came out of Fastmail, but I've not seen anything beyond a few hobby projects integrate with it. Event Fastmail's own clients are just web wrappers, not JMAP clients.

Agreed 100% and we'll slot these into our roadmap. We started out with Google because it was the fastest. Will definitely look into Hypernote integration as well.

I second this, as a big Fastmail user