I've written Go for three years, and I've successfully avoided using interface{}. It's a matter of architecting your application to fit the language and choosing a different language if your requirements grow beyond what Go can provide. Golang has made a tradeoff between simplicity and abstraction, which is a perfectly fine choice. Turning Go into Java is just going to ruin yet another language with complexity thanks to mob mentality.

It's not always that simple. Sometimes you cannot avoid using interface{}. There is a reason why some SQL libraries use interface{}, why (un)marshallers use interface{}, and why I use it heavily in my scripting interpreter which is written in Go.