Signal is working on a way to sign up without a phone number. The feature has not yet been officially confirmed, and it is not yet known whether it will be available to all users or in what form.
I guess the best is a hybrid where the server is just optional for asynchronous messaging, and if the server is temporarily down, the service just becomes temporarily degraded into synchronous mode.
That’s a good point.
I guess the best is a hybrid where the server is just optional for asynchronous messaging, and if the server is temporarily down, the service just becomes temporarily degraded into synchronous mode.