I don't think goroutines / channels is a clear win or even that relevant for data-oriented gameplay code. I go into this more in-depth in this comment: https://www.reddit.com/r/golang/comments/r2795t/i_wrote_a_si... (it addresses a bunch of points)

This is what the game code looks like: https://gist.github.com/nikki93/0425d9ead9eb7810075434d006f3... -- I don't think CSP helps much to improve on that while keeping serializability of state.