Platforms should not own content and subscribers graph. Users should own content and subscribers graph, preferably by reliance on public key cryptography. Then

Platforms should not own content and subscribers graph. Users should own content and subscribers graph, preferably by reliance on public key cryptography. Then you will be notified of your peers' contents on any platform. Imagine a popular but controversial blogger deplatforming attempt, followed by his 300k subscribers getting an 'Your contact has just uploaded their first video on NextTube' notification in five minutes. You don't need many platforms when platform understands they only have power to de-content themselves. You also no longer need those rows of social icons since you only need to subscribe to a creator once. Content should reside in P2P/DHT mesh and platforms would only present, curate, decorate and discover it. But it should also be discoverable via PKI+DHT.