HN has a totally different userbase (though there is some cross over) than Reddit. To me Reddit's trollish uninformed arguments are what makes it funny. For instance, /r/The_Donald and /r/SandersForPresident are basically parodies of themselves. Frankly, I'm going to go to Reddit for a laugh, and maybe a few sorted threads with insight into live events unfolding...but if I want something serious I'm not going to go there. Reddit to me is like Something Awful used to be but on a much larger scale, and that's why I like it. If Reddit ever matured to be like HN, I would probably stop going there. It's a happy medium between dashing moments of HN like insight and 4Chan like stupidity.