Leaving aside other flagged terms, I have seen people take offense to being called cis or cisgender, so if the concern is to avoid people feeling attacked in the public sphere, it seems as valid as other similar protections.

I'm not sure why it's at Musk's "whim". Maybe I missed that he personally made that call in the linked article?

It’s weird since it’s just a technical term that fits the majority of people. The reason that most are unfamiliar with it is just that being transgender has been stigmatized historically and therefore not been talked about much and when you assume everyone is something, you don’t need the term for it.

It’s kind of like of heterosexual was considered a slur suddenly when the discussion of homosexual rights started gaining speed. Because of old people angrily stating “I’m not a heterosexual! I’m normally sexual damnit! We don’t need a term for that!”

One should avoid type-casting people. It is tantamount to being a slur all by itself. As far as discussing Elon Musk's whims, let's not feed the troll.

Isn't this super old news...?