The "criticisms of Go are addressed every time the language is discussed: in practice, generics are rarely missed. They would be nice to have, but their absence is outweighed by other benefits of the language.
Critiques of Go tend to be principal-based: "Go doesn't have features X, Y, and Z, therefore it cannot be a good language. QED." Praise of Go, on the other hand, tends to be pragmatic: "We built something in Go, features X, Y, and Z weren't missed and we enjoyed features A, B, and C, which the language's detractors oddly refuse to acknowledge." Which view carries more weight is left up to the reader.
> http://paulgraham.com/avg.html
I know this is heresy, but has this article really held up well over time? Since 1995, when ViaWeb was founded, how many other companies have been able to run rings around their competitors by using Lisp or something similar? Are we really going to base our arguments on a sample size of 1? How many counterexamples are there?