This article has some good points but I'm going straight for the first one: I don't miss generics.
Indeed, they are useful. I use them in Java every time I find a good reason to do it. So, I should say in another way: I don't miss generics in Go.
Given my experience [0] in Go in the last years, I realized that if you miss generics in Go, your code is trying to cope with too much.
I didn't miss them when I developed Mergo [1], a simple library to merge structs. I think we all agree if we should rewrite this in Java (or other language with similar type system) we would use generics at some point.