The difference is that today it is possible to "enough" generalization on top of managed services and cloud infrastructure that you can be deep on cloud deploym

The difference is that today it is possible to "enough" generalization on top of managed services and cloud infrastructure that you can be deep on cloud deployments + full-stack webdev, or cloud deployments + game engines or whatever that avoiding the need to have horizontal separation of teams gives significant leverage. The teams that own their stack end-to-end (on top of other external systems and teams, true) can move faster that those that require internal coordination and they can do it without losses in quality/availability/stability.