The only thing that can replace e-mail is, e-mail. We need a means for communications that are not instant, and allow for long-form, off-line, complex interact

The only thing that can replace e-mail is, e-mail. We need a means for communications that are not instant, and allow for long-form, off-line, complex interactions, based on decentralised infrastructure. That'll continue to exist in some form along with all the other means we have, and that's a nice thing.