After taking a stab at some more functional approach with generics in Go — https://github.com/gtramontina/go-extlib — I do agree that some of it does feel shoehorned. Although for some other constructs, it feels quite nice. As I mentioned on the readme of the linked repository, this post https://hypirion.com/musings/type-safe-http-servers-in-go-vi... presents pros and cons nicely.