Exactly. 280 characters*, replies being seen without the text that they reply to, the mess that you see when you look at a random hashtag… and perhaps not surprisingly those are things that Mastodon addressed. The difference is blatant - explain something poorly in Mastodon and people will either ignore you or say “what do you mean by that?”; do it in Twitter and you’ll see an angry mob waving pitchforks.
*Thankfully Elon Musk is a moron and inadvertently fixed this, by increasing the character limit. If he knew what he was doing he wouldn’t do it.