Amazon needs a second headquarters because it can’t convince people to move to Seattle where average home prices are $700k. If Amazon moved their HQ to Boston, home inflation would spike to 10-20% annually. Boston ($500k avg) will be Seattle in no time flat. How are you going to recruit outsiders when home inflation is off the charts? I would throw most of Colorado in the same boat as Boston, plus I don’t care for the Broncos.
Amazon needs a market with some real estate runway: Dallas: $300k, Atlanta $185k. But Dallas is a cluster-f traffic nightmare. Atlanta traffic is a disaster also, but at least you could afford a home there.