> Go is not optimized for FP, and chooses "clumsy" for loops over clever functional programming because the loops have mechanical sympathy and are simply faster in execution speed.

So are iterators in Rust which allow you to write idiomatic iterator experessions. Hell, even LINQ in C# has improved dramatically and now makes sense in general purpose code where you would have erred on the side of caution previously. You can pry ‘var arr = nums.Select(int.Parse).ToArray();’ from my cold dead hands.

At the end of the day, it is about having capable compiler that can deal with the kind of complexity compiling iterator expressions optimally brings.