yes, the internet has to have async
i am working towards phasing out my phone altogether and replacing it with VoIP based phone and SMS messaging, if that's possible, otherwise i get a dumbphone just for SMS and calls but it's gonna be some rugged thing and i'll want to throw it at the wall a few times
i'm not sitting up waiting for people to respond to me, when i'm at the computer, and not working, i'll check my messages, like i am now
the whole purpose and principle of nostr is exactly like email, you have relays (POP) and clients (SMTP)
currently lightning only has a sender, and the receiver must be alive for the message to send, there is no "try again later" option
people can run their own post offices and it's just like having a mailbox in front of your house, or you can have a post office box
these ideas that things must all be live and immediate is a product of conditioning designed to make obedient internet drones and cult mildcontrol slaves
you aren't one of those so yes you want async