It's not necessarily a feature that needs to be embedded in the protocol. There's lots of innovation clients (and servers) can do independently even with a shared protocol.
That said, I'm still curious if JMAP might ever get much traction outside of Fastmail and a few others. They make a good point that having an HTTP-capable and JSON speaking protocol opens up potential webmail client innovation in good ways. But I don't expect we'll see a much faster adoption curve than the currently slow trickle.
Agreed! And yes, JSON and http would simplify a lot of things.
I was considering writing my own email client for a while, but instead I pivoted to my own budgeting app for now. Will get to the email client if I ever have time, lol
That said, I'm still curious if JMAP might ever get much traction outside of Fastmail and a few others. They make a good point that having an HTTP-capable and JSON speaking protocol opens up potential webmail client innovation in good ways. But I don't expect we'll see a much faster adoption curve than the currently slow trickle.