> Honest question: was an LLM involved in writing this comment? The em-dash style stood out to me

The use of em dashes looks pretty natural to me. This is how they were used before LLMs, and what LLMs learned from.

Em dashes have a useful place in written language. I hope we will not lose their utility because people treat them as enough of a signal on their own to automatically question the authenticity of absolutely well-written pieces of text, without giving the matter any further consideration.