I've ended up using at least a half dozen generic helpers in every application I've written since they were added. They've made my coding easier, more concise, and help with testing. Adding generics to Go was well-founded.
I also like using generics for API request/response code, ex: https://go.dev/play/p/OWf9eFmg1qF
With generics you don't need to return any/interface{} / type assert at runtime
func Request(req, resp any) error {
// send request (http, etc)
b, err := json.Marshal(req)
if err != nil {
return err
}
log.Printf("sent request %+v - %s", req, b)
// read response
if err := json.Unmarshal([]byte(`{"success": false, "error": "invalid login"}`), resp); err != nil {
return err
}
return nil
}