This is not what I mean. I mean make it mandatory for these networks to allow interconnection with eg the fediverse, so that I can connect with people on Facebo

This is not what I mean. I mean make it mandatory for these networks to allow interconnection with eg the fediverse, so that I can connect with people on Facebook or Twitter without having an account on these services myself. Currently users are captive to a network, not due to an impossibility to recover their data, but due to the fact that their friends are using that network and that network is not interoperable. Basically I think networks like Facebook and Twitter are so big at this point that they should be infrastructure.