> Wikipedia uses these, among other characteristics, as potential signs of AI writing

From the same article:

“Do not rely too much on your own judgment.”

“human editors and writers often use em dashes”

Indeed. People use em dashes. And curly quotation marks. And emojis in headers. And use boldface and italics to emphasize things. And overuse the "it's not X, it's Y" construction. People could also do all of these things at the same time. Or maybe do them sometimes and not other times for fun.

It is obviously impossible to be able to tell with 100% certainty whether or not something is written using AI. But I think this most likely is. Could be that it's just copy edited with AI and not wholly AI slop. Who knows. Either way, it reads very much like AI to me.