Hm ... I wonder, is Grammarly also responsible for the flood of contraction of lexical "have" the last few years? It's standard in British English, but outside of poetry it is proscribed in almost all other dialects (which only permit contraction of auxiliary "have").

Even in British I'm not sure how widely they actually use it - do they say "I've a car" and "I haven't a car"?

"they" say "I haven't got a car".

Contractions are common in Australian English to, though becoming less so due to the influence of US English.

In my experience "I've a car" is much more common than "I haven't a car" (I've never heard the latter construct used, but regularly hear the former in casual speech). "I haven't got a car" or "I've no car" would be relatively common though.

This is what peak innovation looks like

I don't think an LLM would recommend an edit like that.

Has to be a bug in their rule-based system?

Gemini: "Was trulyn't" is a contraction that follows the rules of forming contractions, but it is not a widely used or accepted form in standard English. It is considered grammatically correct in a technical sense, but it's not common usage and can sound awkward or incorrect to native speakers.

I wonder how much memes like whomst'd might skew the training set.