When our lifetimes has it not always been this case? Newspapers, television, internet have always been this way (owned by an organization and provided with contractual limitations). Talking face to face in your own home is the only unabridged communication method, even in the USA. I have always found this issue strange that people demand that App Stores, cloud platforms, web hosting, etc must allow any content despite the companies’ freedom of association (and disassociation). We aren’t talking about companies which are covered by Common Carrier laws.

And “existential” doesn’t mean what you think it means. They are rebuilding on different platforms and other substitutes are coming online.