This is highly dependent on the moderators. If you have good moderators, you can have a subreddit with quality posts and comments rivaling HN. If you have bad o

This is highly dependent on the moderators. If you have good moderators, you can have a subreddit with quality posts and comments rivaling HN. If you have bad ones, it can (and will) devolve into toxicity and ideological bubbling. I've seen both and I've seen ones in between. That said, maybe I'm just not in the loop, but I'm not aware of any subreddit dedicated to reviewing podcast episodes. Also, I'm not sure the Reddit format lends itself to creating a database of user reviews for certain episodes without heavy moderation and a heavy-handed approach to posting (for example, to avoid duplicates). A lot of this needs to be formulated into an automated system that only a custom-made site can offer.