1. SPA that you can run on your phone or desktop
2. Centralized User Management, need some way to block known bad actors
3. Signing posts / comments
4. Distribution of posts and comments over DHT?
5. Hosting images, videos and lengthy text posts on torrents
6. A whack ton of content moderation software to somehow make decentralized moderation work.
7. Image recognition for gore / CP that inevitably will get spammed
This would enable people to help host the subreddits they are subscribed to, but murder battery life on mobile unfortunately.