Being affiliated with htmx or not doesn't change basic facts about web accessibility :-D Go look at the links I posted, look for the issues people filed against the repos claiming that their dynamic content updates break screen readers. There are zero. People understand how web accessibility works and what responsibilities lie at which parts of their stack.
Now if you say that component frameworks like shadcn/ui or whatnot should implement accessible behaviours and patterns, I am 100% with you on that. But React/Vue/htmx are at a lower level, they can't decide those things for you.
