But that is exactly the point - you would have added the best proposal available to the language vs. waiting till all issues are worked out with generics. Go 1.0 has been released 7 years ago, in that time a ton of happy Go users were able to use Go as it is. All the discussions on generics clearly show, that the Go team is interested adding them, but that all proposals so far had distinct shortcomings.
Personally, I am very happy with what Go offers today, I would rather keep a small and simple language, which allows me to concentrate on doing work, rather than trying to keep up with features added to the language. I am not even sure, I want generics to be added to the language, until they come up with a really great concept which maintains the simplicity of the language.