Twitter's usefulness mostly comes from the celebrities being there. The initial reason the celebrities were attracted probably had to do with the char limit, its pretext, that they are not expected to read too much and that they are not expected to write too much.
Interesting. So if Twitter's celebrity appeal is about brevity, and brevity is a big part of why the platform is so toxic, maybe the best outcome is for it to just get regulated out of existence? Like, we could pass a law that prohibits character limits on social media sites or something.
If you want to explore the community more, I recommend reading the Library, checking recent Curated posts, seeing if there are any meetups in your area, and checking out the Getting Started section of the LessWrong FAQ.
The Open Thread sequence is here.