One frustrating thing about Moxie's original post is that Signal derives huge amounts of value by piggybacking on an existing distributed federated network: the phone system. If phone numbers weren't an existing working identifiers that people had regardless of what OS, carrier, or messaging app, Signal as designed wouldn't work.
People should think harder about how to replicate that experience, instead of how to appropriate it and then abandon it.
People should think harder about how to replicate that experience, instead of how to appropriate it and then abandon it.