Those social networks are all sitting on top of the same internet, and everybody is on the internet (e.g. there's no reason why different social networks should

Those social networks are all sitting on top of the same internet, and everybody is on the internet (e.g. there's no reason why different social networks shouldn't be able to integrate with each other). (I shudder in horror to think what email would look like if it was invented today by some Silicon Valley techbro startup - interoperability somehow isn't even considered as an option anymore)