We have more freedom here, don't have to worry about stepping on any corporate toes. Also the viewership is a lot smaller and the people that are here are more interested in actual information and discussion. I don't think that will change a huge amount, but as the platform grows we may see more shitposts.
Also it takes a little more effort to deal with the decentralized platform here. It kind of weeds out the user base. I mean I've been astonished by the lack of effort seen in some Reddit posts. For example posting a question that can be answered straight away with a simple search.
Discord is great for real time chat, but really bad for threaded conversation which was what Reddit was good at. Didn't anybody mention the Fediverse and Lemmy/kbin to them?