I agree about the unhealthy relationship, but I think you're understating the media lens on Meta: there's been a running column on their (slow) implosion in the NYT for at least a year now. The recent "legs" affair was the tech news story for a day or two.

Twitter gets disproportionate attention because of the relationship you mentioned, but also because what's happening to it is pretty unprecedented. It stands to reason that it'll be the main topic in tech journalism for the next few weeks, particularly as Musk continues his attention seeking behavior (and journalists continue to feed on it).