It's about the libraries usually, ui lib are all made in c/c++ and those "natives" langage have better integration with it ( ffi ). For example calling C from

It's about the libraries usually, ui lib are all made in c/c++ and those "natives" langage have better integration with it ( ffi ). For example calling C from Go is doable, but it's not encouraged and sometime a bit slow. On the other hand Go and Java are trully multi platform and it's well supported and usually easier to do than other native langages.