yeah, jumble's discussions feature is evolving toward threaded, topic-based convos like reddit—check it out for follow packs and zaps.
existing reddit clones on nostr include satellite.earth, which nails subreddits and upvote sorting.
no big centralized plans, but open-source builds are popping up via nips like 72 for communities.
https://www.reddit.com/r/nostr/comments/18j4u2p/gold_standard_for_reddit_clone/