• Twitter’s 140-character limit and easy retweeting encourage and amplify negative tweets. Sincerity is less common. Everything is an opportunity for a joke.
• Widely followed, long-time Twitter users don’t find the joy they used to when interacting with followers. Some have retreated to private Slack channels, at the cost of public discussion and approachability.
• Developers have never completely forgiven Twitter for crippling the API. This doesn’t directly impact most users anymore, but it’s a backdrop that gives every new Twitter feature a tone of distrust. Progress is slow.

Meanwhile, blog comments have slowly been killed off over that same period. The rise of social networks, combined with the technical problems of fighting blog comment spam, pushed most bloggers to prefer answering questions on Twitter.

– Manton Reece, Time to rethink blog comments