Search is hot garbage, can't find anything useful, or what people are actually talking about, not that Twitters search is great by any measure.
Missing content when visiting external content, cuz why would anyone ever want to see or search old content.
Also most clients I have seen show replies in a really stupid way, you have to actively click to see what the person is replying to, its not visible in the timeline.
Outside of the English speaking indie-privacy-tech bubble (and germans seem to be very active on it too) its a ghost land.
In general I have been spending more time on hacker news and youtube than Twitter and fediverse, they aren't like pre-elon twitter.