102 so far. It's mostly porn and the creepy hentai and furry stuff, some of the foreign language communities that get through the filters, and things like different sports, that I'm never going to be interested in.
As other people have said, I want to be able to browse through All to discover new content, but there's no point in seeing things that I'm never going to like.
Imagine buying a book only to find out that you can't read it anymore because the store you bought it from decided to remove it from sale and stop all downloads of it. You can't restore it from a backup because the DRM prevents that.