I use en dash with two spaces and have done so before AI. But my comments here are from after GPT 4 released, so I guess I can't prove I didn't use AI to write them, although I don't think any AIs use that style. Here is one from February 2024: https://news.ycombinator.com/item?id=39386480. I don't like how "-" looks, it just looks like a minus sign and too short.