They don't work when you concentrate power in large companies that waste human resources and continue to have large blind spots. Our tech sector would be way more robust in all dimensions if it were made up of thousands of entities rather than these monoliths. As HN as this sounds, we need microservices and service meshes to make capitalism work. Anything else and you get myopic, calcified monopolies, that while they dump huge sums of money into projects, that money is largely wasted.