Having used C#, C/C++, Ruby, Perl, PHP, and Javascript, I find golang to be one of the most refreshing approaches to programming among them all. I think many people are finding themselves feeling upset because they are convinced that the simplicity of golang implies only idiots use it which then must mean that the language will be a failure (almost at an a priori level).
If that's true then you might not benefit from generics directly. But you will benefit from having an ecosystem of libraries that take advantage of generics. And even if you don't use other people's libraries, not everyone in the world happens to be as lucky as you and they do need generics to make their lives easier.
But again, I still severely doubt you've never run into a problem with Go's lack of generics. I ran into it after about 3 months of working with Go. Maybe you didn't find the work-arounds problematic, but that doesn't mean that the original limitation (no generics) doesn't cause problems. You just choose to accept the work-arounds as the "right way" of doing things.
If you haven't already, I would recommend looking at Rust or another modern language that has generics to see what sort of benefits you can get out of it that you can't directly get with Go. Personally the fact that if T implements an interface I won't let you use []T as []I is pretty silly IMO. Rust lets you do that with the From trait, and you can even do it even more generically with the From trait using a generic T.
I am another developer who has never really suffered as a result of a lack of generics. Personally I really like how dead easy golang code is to read and understand. God forbid golang become a language where untold amounts of logic can be packed into a single line of code, resulting in near mathematical levels of complexity which always require more time to understand. Like most complex concepts in life, I suspect the number of developers who can effectively use these tools is rather small compared to the number of people who think they "need" them. But hey, I'm a vim programmer who doesn't like to have to rely on a bloated IDE to be able to deal with the code that I am interacting with so I might be a minority.
