One implication he makes is that because independent Mastodon servers can block each other, they must be no better than Twitter. "We can, and should, always strive to build better, more accessible, and more inclusive technology. But decentralizing the web into walled-off silos [referring here to decentralized applications like Mastodon] seems unlikely to accomplish this goal." He completely misses the point that with thousands of Mastodon servers to choose from, you are free to chose one that does not block other servers. With Twitter, you have no such choice.