> We pay huge communication/synchronization costs to eek out mild speed ups on projects by adding teams of people.
Something Brooks wrote about 50 years ago, and the industry has never fully acknowledged. Throw more bodies at it, be they human bodies or bot agent bodies.
But there is a level of magnitude difference between coordinating AI agents and humans - the AIs are so much faster and more consistent than humans, that you can (as Steve Yegge [0] and Nicholas Carlini [1] showed) have them build a massive project from scratch in a matter of hours and days rather than months and years. The coordination cost is so much lower that it's just a different ball game.
[0] https://steve-yegge.medium.com/welcome-to-gas-town-4f25ee16d...
[1] https://www.anthropic.com/engineering/building-c-compiler
The point of the mythical man month is not that more people are necessarily worse for a project, it's just that adding them at the last minute doesn't work, because they take a while to get up to speed and existing project members are distracted while trying to help them.
It's true that a larger team, formed well in advance, is also less efficient per person, but they still can achieve more overall than small teams (sometimes).