It really doesn't sound like ChatGPT’s default voice, though it is pretty good at taking on different voices so in a sense you could say that about almost anything. It does use em-dashes, which people have recently started way over-indexing on as a ChatGPT tell, but lots of posters on HN have been using em-dashes for longer than ChatGPT has existed.

It does read like marketing material, though.

It's not just the em-dashes for me. It's actually more these parts:

But here’s the point:

That’s the win:

Those sound exactly like ChatGPT when I tell it to write in a more direct, opinionated style.