Before it became trendy in the West, Quinoa was a staple for the poor in the Andes. It's growing popularity has priced the grain right out of the market.
The article raises some good point, however, I kind of think it unfairly centres out vegans. I know lots of non vegans who eat it.
Pitseed goosefoot, a relative of quinoa was part of the original Eastern Woodlands agricultural package before the arrival of corn. This makes me wonder if it could be redeveloped into a pseudocereal crop as a local alternative to quinoa? It is currently grown in Mexico as a green vegetable. The price of quinoa would currently justify some experimentation.
I have another relative of quinoa growing in my garden, strawberry spinach. I use it for the greens and the "berries", but apparently the seeds can also be eaten like quinoa.