I must confess that I asked a leading question. At no point did I say that the usage wasn't real; by way of dramatic omission I was more pointing to the fact that a common ECMAScript/React-ism is overrepresented in Claude's training set to the point that it's being applied to situations not involving duck-typed languages.

I'm not a grammatical prescriptivist but I find it viscerally troubling that a bunch of LLM cargo-culted terms are starting to inform how we talk about our work.