Earlier quoted context omitted.
Maybe Twitters "UI" is so messy is because its text. People can make up any convent they want. Like signing posts with ^.
compare and contrast to reddit: text but extremely simple, intuitive, you can follow conversations, know who is talking to whom, respond, link, etc.
I'm fairly technically proficient and I have a hard time figuring out how to "onboard" myself to Reddit and to understand the whole system. It's relatively intimidating.
If we want to stick to text-only, I think HN is actually a better example. Of course, Facebook is really the pinnacle of broad accessibility.