Those are thought-provoking points. I'm trying to remember how I originally used facebook back in high school, and before the News Feed and Like eras we definitely used facebook much differently. Still, I think people use Snapchat to share more inconsequential parts of their lives than we ever did on facebook, but maybe that anecdotal experience isn't true, or maybe the difference is so minute that it doesn't even matter.
You've definitely changed my view of these social media platforms. I'm not sure that I absolutely agree with you, but I'm not sure where I disagree, either. Great points, all around.