It's really the intersection of stuff though - he's driving plenty of the attention, but Twitter's also a large and influential company, so changes to their business model, moderation, and staffing are all things that would make the front page of HN even if their CEO was someone less interesting.
I'm feeling burned out on it all as well, but it's not as if each of these moves is some meaningless thing that's being hyped up just because it's Musk. If Facebook started charging $8 for a super-Instagram account, that'd be big news.
It's not as if we get posts for random things about Tesla or SpaceX all the time - it's mostly just for major launches, product or rocket. The recent circus is exceptional because it's so many movements happening so fast.