Not sure what you mean about F# - being a CLR language, it has the same runtime issues as C# (and IronPython, managed C++, etc).

The article you quote is a toy example - if you write a C# or F# web API server, you'll see that it takes up way more space than a Go one with similar functionality (and has way higher memory overhead as well). A Go API web server is maybe 10MB on disk, with no dependencies (that is, you can run it perfectly in a container that is defined as `FROM scratch; COPY my-go-exec /my-go-exec `). The equivalent Java or .NET container is somewhere around 2-400MB at the minimum.

As for the syntax and constructs, I don't care so much. If OCaml or SML had comparable support and a comparable ecosystem to Go, I'd bet plenty of people would have chosen them instead.