I wan not convinced by Kent Beck. I’ll look into it for more.
The code will be simpler and simpler. If you don’t make it simple, others will.
Stupid code will not stuck you anymore because you can get it out of the way.
It helps to spread knowledge of the system around the team.
Face-to-face is the best intense from of communicateion.
It also helps with spreading with knowledge.
The quality resulting code is so much higer
It takes two people to do one task. What will the productivity will be ?