I don't get why one wouldn't just use webworkers to run the simulation instead, thus making the game fully executable in a web browser. If deno has some perks

I don't get why one wouldn't just use webworkers to run the simulation instead, thus making the game fully executable in a web browser. If deno has some perks during development, there must be a way to replace websocket with some other transport that works with webworkers for "production" builds.