That would have to happen soon, and if it did, you'd be right. The vision of a decentralized social web would die again, and one billionaire would make another

That would have to happen soon, and if it did, you'd be right. The vision of a decentralized social web would die again, and one billionaire would make another even richer. Some moaning would be had on the Internet, but the world would continue to spin. But, if the AT protocol even makes it another ~6 months without that happening, it will become impossible. You won't need to "trust" anyone to host anything, and if you want you'll be able to take your data and go somewhere else. That's the vision, and that's so far exactly what the folks at BlueSky have been building. So no, the answer isn't "Larry and Jack wouldn't do those things" the answer is, "They'll have to act very quickly and in ways that are completely out of character for them, not to mention the staff at BlueSky would have to all sell their souls which is also completely out of character for them as well." But yeah, if you're a cynic I guess everything is on the table.