Me either, technically, but it seems if each users posts and its replies were in a "room", and then a client was developed to read and aggregate the posts and replies in a given set of "rooms" and then served up in a thread like way, it might be possible.
Discussion
You actually described Nostr, relays are rooms
If the relays are the rooms, would it be possible for each pubkey holder to run a relay on their device using holepunch as the initial seeder. Each follower who joined the relay would also become a seeder for said relay. As the number of followers increased, the overall relay bandwidth would also scale.