Comment by piva00
In this future you will have different factions living under the same territory, each belonging to a different "corporate entity". Usually in human history anytime this happened we either joined forces of different factions into a "nation" sharing a common territory or all-out civil war broke out.
Removing the concept of nation to become a scattered technotribalism doesn't make sense, we need to go up a level where the whole concept of separating individuals by nations start to dissolve and we all share a common culture of being humans. For that the first barrier is language, without a common way to communicate between ourselves it's pretty hard to see the other as similar to you.
What you advocate for is going back to tribalism.
There has always been multiculturalism, even hundreds of years ago.
One example was Córdoba, where Muslims, Jews, and Christians lived together. They even had different laws, because the Muslims had what they called "dhimmi" status, which meant that different groups had their own jurisdiction granted by the Muslim rulers.
This ended because of many factors, one of them being the collapse of the Caliphate due to internal strife. So I grant that it is difficult, but not impossible.
Our descendants will see if this form of living together can be sustainably established in the future.