I'm not sure what it's like at Amazon, but I expect they're in a similar situation as the place I currently work, which is that probably a third of the talent has simply moved away and doesn't even have the option of coming to an office anymore. Are they going to tell Jane the Star Dev that she needs to sell her house and move back into the city or else she's fired? If anything they're probably going to have to wait a few years and let natural attrition sort it out.