ryah immediately posted the following series of tweets, to such effect:

"Thanks-some valid criticisms. The story doesn't stop at the process boundary. Concurrency through Spawning&IPC should be discussed"

"ie, "actors", although not explicitly given that name, are baked in. I just don't feel then need to put them inside the same process."

asked about impl discussion;

"Not really. It's not fancy: unix socks, no framing protocols, no RPC daemons. But using what's there is a valid concurrency solution."