Yeah, I mean if you wanted, you can include reddit (and hacker news) in your RSS feed, so no need for replacement. That said, the entire point of RSS is to curate your own experience so just linking it to reddit (or hackernews) sorta defeats the purpose. I guess its nice to have both in one place.
As for Facebook, I haven't used it since 2008 when it became clear it was a cruddy company led by a misanthrope so I can't speak to that.