> Coordination has in my experience always been the big bottleneck in getting anything done
I work at a large enterprise you've heard of. They're currently re-organizing the product area to remove currently-static two pizza teams into an amorphous blob of feature-oriented teams. Once the feature is complete, the team is dissolved and the engineers re-enter the pool, tasked with new features.
All that to say, I think you're right on the money with your assessment.