Recent quotes:

Twitter is polluted and getting worse

Even though I follow people I like and respect, there’s no way around seeing some of the crap that happens on Twitter. Even if you don’t use Twitter at all, you will have seen articles about people being harrassed and threatened. You will have noticed the pure toxic sludge that pours through the service. (A hypothetical “Dawn of the Idiocracy” prequel would feature Twitter prominently.) And it’s worse than any blog comments system, because if you use it, anybody can put something in front of your face whether you want it or not. Twitter is also wonderful, and I get so much value out of it. But it’s like 51% good and 49% bad. I don’t see it getting any better. Hopefully it can hold the line at just-barely-worth-it. (But the recent changes to the timeline make that a little less likely.)

Even smart people start shouting amid Twitter's noise.

My feed (full of people I admire) is mostly just a loud, stupid, sad place. Basically: a mirror to the world we made that I don’t want to look into. The common way to refute my complaint is to say that I’m following the wrong people. I think I’m following the right people, I’m just seeing the worst side of them while they’re stuck in an inhospitable environment. It’s exasperating to be stuck in a stream.

Twitter too noisy

But what I’ve come to call Big Twitter is simply not a place for conversation any more. I don’t like this change. I made friends — real friends — on Twitter when it was a place for conversation. I reconnected with people I had lost touch with. Whole new realms of knowledge were opened to me. I don’t want to foreclose on the possibility of further discovery, but the signal-to-noise ration is so bad now that I don’t think I could pick out the constructive and interesting voices from all the mean-spiritedness and incomprehension; and so few smart people now dare to use Twitter in the old open way. Big Twitter was great — for a while. But now it’s over, and it’s time to move on. I’m just hoping that some smart people out there are learning from what went wrong and developing social networks that can strengthen the signal and silence the noise.
most of what's out there is crap. When the half-life of a post is half a day or less, how much time can media makers put into something? When the time a reader spends on a story is (on the high end) two minutes, how much time should media makers put into something? The necessity of nowness plus the professionalization of content production for the stream means that there are thousands and thousands of people churning out more crap than can possibly be imagined. And individual consumers of information have been tuned by social-media feedback mechanisms (Likes!) to do for free what other people do for money. They, too, write viral headlines, post clickbait, and compete for mindshare.