Thanks! We're all pretty happy to keep doing what we're doing for a long time yet :) Have plenty of new stuff on the go (see the email work happening at IETF, a lot of it's being led or shepherded by someone from Fastmail)
AI is... yeah. I can see in theory being able to have an AI answer questions like "who sent me a question I haven't replied to yet?" or "who have I emailed something expecting a response to and not heard back from?" could be powerful - but the tech is really immature and it hallucinates the craziest things. I don't think it's something we need to do in-house - it's something that could be added on with an IMAP or JMAP connector for those who want it.