Malcolm Harris' Palo Alto explained the failures of many dotcom startups and Amazon's later success in the field (in part) to the fact that dotcom era delivery was done by highly trained, highly compensated, unionized in-company workers, meanwhile Amazon prevents unions, contracts (or contracted, I'm not up to date on this) companies for delivery and has exploitative working conditions with high turnover, the economics are very different and are a big contributor to their success