The em-dash meme, if it's actually a thing, I find really annoying. That's the style in a lot of places and for a lot of people with or without spaces on either side. It was house style a a few different places I worked over about 25 years. More broadly, I assume LLMs are training on how a lot of people actually write. I'm not changing my writing style because some people will flag it as LLM-generated <shrug>.