I get the hesitation from people used to C# or Java where OOP has always been the law of the land, but the rest of us who have used D, C++ or Python... to name a few... OOP is fully optional, and that's how I want OOP in any language, give me multi-paradigm any day of the week.

I would have loved Go more if they had made "lightweight" classes a thing, something feels wrong tying structs and functions, you could have added a wrapper around both to make the code more organized. I guess that's what I like about OOP, organized code. I don't even care about most OOP things, I just want to organize code in a meaningful way.