This is a weird pattern in that presumably mass abandonment of the em dashes due to the memes around it looking like AI content would quickly lead to newer LLMs based on newer data sets also abandoning em dashes when it tries to seem modern and hip and just punt the ball down the road to the next set of AI markers. I assume as long as book and press editors keep stikcing to their guns that would go pretty slow, but it'd eventually get there. And that's assuming AI companies don't add instructions about this to their system prompts at any point. It's just going to be an endless arms race.

Which is expected. I'm on record very early on saying that "not looking like AI art" was going to be a quality marker for art and the metagame will be to keep chasing that moving target around for the foreseeable future and I'm here to brag about it.