Many people browse at work, and only have time for a few paragraphs here and there. So they read whatever happens to come up on the screen. Keep messages to a screen or two at the most. The longer a message is, the more likely people are to put off reading it until they have time. Often, that time never comes.
Longer messages are also hard to respond to.
Three thousand lines of text discussing twelve interlinked topics can be so daunting that no one takes the time to respond. If you want to put in the effort to write huge volumes of prose, spend some of that effort editing it. Avoid hypnotic language. It will elicit some response from anyone who reads it. I'm willing to bet that it has never elicited the response the writer intended.