[akavlie]

A lot of people are not free to decide that. Go has become very popular in young, mid-size tech companies. Most of the alternatives you listed are too new/fringe/unproven to consider. And, well, they're not made by Google (corporate backing makes a big difference with new languages).

[geodel]

It is also getting popular with IBM, Comcast, RedHat and of course Google etc which are older and big companies.