Amazon's AI business is growing several hundred times faster than AWS did, and it's driving a big part of Amazon's $220B investment this year. CEO Andy Jassy says they "haven't seen anything like it." "In the early days of AWS, we felt like we were growing really fast and we felt good about it, and we were about a $60 million annual run rate business after three years." "In the first three years of this generative AI wave, our AI business in AWS is over $25 billion in run rate. So it's…