I think a big part of what "Twitter culture" is it was many things for many people. Some people use as a place for weird shit posting, some use it for porn, some enjoy bias confirmation, some enjoy the drama and beef. I guess some people enjoy anime avatar reply-guys since some of the new offshoots seem to be catering to maximize them.
For me Twitter would have been better if it didn't have any of that but I get that using it as basically a shitty, short-form substack isn't the most popular usecase. So what I liked about "twitter culture" is that all of these things could co-exist on one site and just curating who you followed could dramatically change that experience.
With a lot of the current drama some of the more serious people are leaving. I'm not sure how it will all shake out in the end, but I don't expect my use case to stay intact.