Absolutely. But I can pay someone else to do one specific part very good, so I don't need to manage and hire for that department. I really don't see a use case

Absolutely. But I can pay someone else to do one specific part very good, so I don't need to manage and hire for that department. I really don't see a use case to do CoLo or DC. Even at ahrefs scale, they probably have a lot more they can optimize before you start going down that avenue.