The main thing Reddit has that is not available elsewhere is a massive relatively unbiased backlog of discussions and community wikis covering topics like what

The main thing Reddit has that is not available elsewhere is a massive relatively unbiased backlog of discussions and community wikis covering topics like what are the best delis/restaurants/bars in city X or car recommendations, or how to find good deals on menswear, or almost any other thing imaginable, this is truly valuable and worth having in society.