Dan Hon, whose newsletter (yes, newsletter) is often full of great thoughts, pretty much sums up the history of writing on the Internet:
One of the reasons — and I hear this concern from others, who have similarly stopped writing online — is that: man, is there so much writing online these days. Oodles of it. It’s almost as if we were at risk of using the internet to commune with each other and then some supreme being like Ev Williams decided: No! You shall not speak person unto person! Instead I will give publishing tools to each and every one of you so that you may all speak and never listen to each other! And then we will invent *comments*, which were like a proto-form of YouTube comments only they weren’t quite as nonsensical and not quite as mean (apart from some of them), and then, just to confuse you, we will invent *trackbacks* and then someone will have to come up with rel=nofollow and then we will all use Blogger for a bit and then it will be bought by Google and then we’ll use Movable Type for a bit and then some of us will use Blosxom and then some of us will use WordPress and then some of us will just give up and use Tumblr and then just when we think we have it all sorted out Ev will go and invent Twitter and then we’ll all truly be fucked because who has the time to write medium/long-form content on the internet anymore when you have to spend the whole day being witty in 140 characters and pretending you’re in an episode of the West Wing.
I’d like to say this is the reason I don’t blog as much as I’d like, but really it’s just the (undiagnosed) ADHD.