@grimalkina I will try to answer with an example/simplification: if I reply to a known follower, I can assume a lot of pre-existing context; if I reply to a new person, I will try to use a low-context answer like in this case; if I post new toots, I assume high-context, because my timeline is the context; if I want depth-seeking discussions then it is better a chat respect Mastodon, or for technical discussions a forum; if I recurrently posts about the same subject, there can be a depth-seeking discussion with known followers, but usually the initial toot is more in the informative and public style; Mastodon is good for news and updates, but for blogging about last-long themes, it is bad, because the content will be lost, and every discussion must start from the beginning.
I think that the main difference respect Twitter, it is that you are in control of your home-page timeline, so you can reduce the toxicity a lot.