[stouset]

His point is that golang makes it unnecessarily hard to accomplish what really ought to be simple tasks inherited from functional programming ideas. Other languages, like Rust and Ruby, have adopted some of the really simple and powerful functional idioms like Map, Sum, Select, Reduce, etc., whereas golang makes it impossible to abstract away any sort of iteration logic. He even shows how this lack of abstraction power has knock-on effects in the form of dramatically-increased difficulty of parallelism and concurrency.