I'm confused. You said "he doesn't use AI" and I took that as a general "he never used AI". If I was mistaken then ignore this whole thread, that's my bad.
But one of the issues with HN threads is that you can sometimes lose the sense of what you're replying to by clicking further down the thread, and I have committed worse misunderstandings than this, so absolutely no need to apologise (and I probably need to consider this when I am replying) :-)