Twitter's original idea and format (short attention-grabbing posts) is antithetical to quality and nuance. I prefer Reddit's format: posts are links to blogs on other sites, and the comments are a common area for discussion.

Sure, link-curation sites can also be low-quality, toxic echo chambers. Reddit is roughly a link-curation analogue of BlueSky, and even HN has some low-effort content, toxicity and groupthink (though it's not nearly as bad). And there are high-quality posters on Twitter, and high-quality invite-only Mastodon instances (at least in theory, I'd love to find some).

But high-quality posts are hindered by Twitter's format. High-quality posts don't fit in 150 words, hence the "thread 1/N", "thread 2/N" workaround. High-quality discussion is hard with a handful of random reply-chains as opposed to a comment tree. Specifically on Twitter, high-quality posts get limited reach because it's non-public with a (mostly) non-customizable algorithm, to the extent I mainly find said posts via links on link-curation sites.

Meanwhile, link-curation sites encourage high-quality content by encouraging (if not requiring) posts to be links. Instead of posting a "hot take", you link to an article, paper, or at least self-hosted blog*. Or when possible, you link to the primary source, and maybe post your opinion in the comments, where it's presented almost exactly like opposite opinions (just with the "OP" indicator). Comments are also better, because every reply to every reply is shown and you can collapse reply trees to view others; and because there's no word limit, so even comments can be substantive (although there's no encouraging mechanism to comment with a link to your blog post or related/contrasting primary source, which in theory could lead to especially high-quality discussions and insight, but I suspect in practice would almost never be used).

* Self-hosted blogs tend to be higher-quality due to an expected minimum length and the effort required to set it up and get attention. Although unfortunately, I've seen some links to no-name blog articles that were especially short and low quality. As mentioned, link-curation doesn't guarantee high quality like Twitter-style doesn't guarantee low quality, they facilitate high/low quality respectively.