I'm the author, and to be honest I agree. I was still fairly new to OCaml (and ML in general) at the time, so I tried to focus on what I knew rather than rattle

I'm the author, and to be honest I agree. I was still fairly new to OCaml (and ML in general) at the time, so I tried to focus on what I knew rather than rattle off a list of things I had heard were better but didn't really understand.