I think I recommend you reading the proposal them. I don't claim of being a specialist in Go to say if it is possible or not, but I find it highly unlikely give

I think I recommend you reading the proposal them. I don't claim of being a specialist in Go to say if it is possible or not, but I find it highly unlikely given how the language is. The reason I think nullability is more likely than sum types is because Go tries to be a simple language (whatever the developers of the language think simple is), and nullability is simpler than sum types (both to implement and use). But again, I don't have any special insight