Will deleted all the notes stored on his relay. Even though it's a popular app, and his app is widely used, this doesn't hinder your experience. This didn’t break Nostr, because the protocol is decentralized and built to be resilient. Why? Most people connect to multiple relays. So even if one relay loses data, the content still exists on others. It’s mirrored across the network, not tied to any single point of failure. I hope this helps 😉