The entire idea of artificially limiting communicating with a character limit was destined to reduce civility and the ability to have reasoned, fact-based conversations.
However, a lot of people have already had conversions that were not that deep to begin with, and twitter just helped them get more succinct.
To be fair, that only happens because people work around Twitter's character limit by joining multiple tweets into "threads." It kind of works but it's also awkward and obviously contrary to the platform's ergonomics.
Twitter wasn't designed or intended for deep conversations, though. It's meant for microblogging and posting pictures of your food.