Extraverts on the other hand get energized by social interaction.
(Social interaction requires a lot of processing.)
Why ? It may be related to an organism's baseline of arousal.
The idea is that extraverts may have a lower baseline arousal rate, that they enjoy raising by interacting socially.
Introverts have a high baseline level of arousal, which gets raised too far by too much social interaction.
It is thought that extraverts are the majority making up 85% of the population, and introverts 15%.
This would explain why open office plans are the norm.
Ironically introverts often self select for work that requires deep focus, and end up having to do it in open plan offices designed by extraverts who see nothing wrong with that.
This is a good book on the topic: https://www.amazon.ca/Quiet-Power-Introverts-World-Talking/d...