Good point. However, similar offshoot languages of Golang, do have them. Those are Vlang (aka Sum Types) and Odin (aka Discriminated Unions). However and per yo

Good point. However, similar offshoot languages of Golang, do have them. Those are Vlang (aka Sum Types) and Odin (aka Discriminated Unions). However and per your comment, only Vlang has the optional GC (used by default) and the flexible memory management philosophy (to turn the GC off without its stdlib depending on it).