Working with a big team scares me. I am working under many silos. The wall of hierarchy and interacting with many personas. It is like many worlds working inside and each being clueless.
I like Jeff Bezos philosophy of 6 member team, fitting on a big size Pizza. Does it still hold for Amazon?
The inefficiency of a big team is more about the communication gap and ego of the gatekeepers. Will automation solve this? Only time will tell, as technology is evolving.