That has nothing to do with federation. A Gmail user can talk to an Outlook user. A Slack user cannot talk to a Teams user.
Email is only federated because it was used before it was commercialized. If companies could monopolize email they would. The solution here is government regulation requiring interconnection, like we got with phones and text messaging.
Do you use Gmail, outlook, etc? A provider backed by 1T+ worth companies?
>99% of people do.
Anything can be decentralized. But people will gravitate toward centralized solutions.
That has nothing to do with federation. A Gmail user can talk to an Outlook user. A Slack user cannot talk to a Teams user.
Email is only federated because it was used before it was commercialized. If companies could monopolize email they would. The solution here is government regulation requiring interconnection, like we got with phones and text messaging.