The server-side process in LiveView does enable some things that I don't think this does, like multiplayer games, collaborative apps and anything where you can

The server-side process in LiveView does enable some things that I don't think this does, like multiplayer games, collaborative apps and anything where you can have data/events made available to the client that doesn't originate from that client. One of the nice things with LiveView IMO is that it makes all of that work in the same programming model as the client sending things to the server and getting responses. It doesn't matter if the event originated from the client, some other client or eg. Phoenix Pub/Sub, it all looks and works the same.