BAD BAD TERRIBLE IDEA. I lived in Seattle for almost 10 years and worked at the South Lake Union HQ in downtown Seattle. You think traffic is bad in Denver NOW? Imagine 50K more cars on I-25, 225 and I-70. Imagine housing costs double what they are now. The state gets greedy for all of the tax money, but they don't understand that Amazon is the master at avoiding state and federal taxes. The downside impact on Colorado would be extreme and the economic upside would not be worth the downside to quality of life and increase to cost of living. I watched Seattle go from a nice place to live with not so bad traffic and affordable housing with a diverse economy in 2005 to absolute constant gridlock, housing prices nearing an average of $1M and a monoculture tech-driven economy in one decade. Don't do it Colorado.