It's not a hack. Think of Asterisk as if it was an http server + backend code. How do you scale? You scale horizontally using proxies (kamailio dispatchers), (

It's not a hack. Think of Asterisk as if it was an http server + backend code. How do you scale? You scale horizontally using proxies (kamailio dispatchers), (what you would call "reverse proxies in the http world), and use external storage / database / logic.