It's great for pubkeys as identity, that is a win to celebrate. But that's pubkeys as idenity. To say it's part of the nostr universe, you have to have a pretty homeopathic definition of what nostr is. Which of cousre you can have such a definition, many people do. But if you're being honest you'll admin that buzz would work more or less the same in terms of functionality and cross-app compatibility if you swap out secp256 for some other scheme. That's the real test.