"Even the 'blogosphere' of the early 21st century, in which independently run blog sites posted items on news and responded both to Big Media stories and to each other..."

"... was more like traditional media in some respects than like Usenet or social media. To read content on blogs, readers had to go there. To interact, bloggers had to read each other’s sites and decide to post a response, generally with a link back to the post they were replying to. If you didn’t like a blog you could just ignore it. A story that spread like wildfire through the blogosphere still did so over the better part of a day, not over minutes, and it was typically pretty easy to find the original item and get context, something the culture of blogging encouraged.... In addition, a story’s spreading required at least a modicum of actual thought and consideration on the part of bloggers, who were also constrained, to a greater or lesser degree, by considerations of reputation. Some blogs served as trusted nodes on the blogosphere, and many other bloggers would be reluctant to run with a story that the trusted nodes didn’t believe. In engineering parlance, the early blogosphere was a 'loosely coupled' system, one where changes in one part were not immediately or directly transmitted to others. Loosely coupled systems tend to be resilient, and not very subject to systemic failures, because what happens in one part of the system affects other parts only weakly and slowly. Tightly coupled systems, on the other hand, where changes affecting one node swiftly affect others, are prone to cascading failures.... [On Twitter,] little to no thought is required, and in practice very few people even follow the link (if there is one) to 'read the whole thing.'"

I'm reading Glenn Reynolds's "The Social Media Upheaval," which just came out today. It's only 67 pages in Kindle, so I got halfway through it reading between sleeps in the middle of the night.