Nostr doesn't compete with social, it is a protocol layer to develop ANYTHING including social. Here are some beneath the surface features:
1. Permissionless protocol for bitcoin payment addressing using nostr wallet connect. Imagine using Venmo to send payments to a user or business on Facebook, PayPal, YouTube, or TikTok. Check out blogs getalby.com and mutinywallet.com for posts on implementation. 
2. Self hosted Oauth-like protocol using nsecbunker.
3. Microservices using Data Vending Machines: language translation, TTS, Generative AI, post scheduling with Shipyard, and infinite space to develop more. Basically microapps can be added by developers to their apps (without permission) to enhance user experience. Fee or free per use built in.
4. There is much more but as a decentralized protocol, it takes effort to find it.