It’s just as scalable as fedi, I’d say it’s even more scalable since relays don’t need to communicate with each other, which reduces the cost to run a relay. The average user experience is basically identical. They download an app, it connects to a set of default relays (or they can choose some manually if they want), they tweet.
Nostr vs Mastodon on Privacy & Autonomy:
Why I think nostr will win https://lemmy.ml/post/11570081