Subreddits are honestly pretty terrible for niche interests compared to a traditional forum. In a normal forum, if your thread about 1998 Honda Civics gets a single post to it a month, so be it, but people are at least posting in a relevant thread and reading up on the discussion that's already been started potentially years ago earlier in the thread. On reddit, you have to post a new submission all the time for a topic to stay in play even in a given niche interest subreddit. You can't post comments on threads that are too old, and new comments don't bump up these old threads anyway. It leads to the same old ground being covered all the time (sometimes you can imagine exactly what the top comment will be), and fragments discussion.
