Someone made a tool a few years ago that basically unmasked all HN secondary accounts with a high degree of certainty. It scared the shit out of me how easy it picked out my alts based on writing style.

I think that original post was taken down after a short while but antirez was similarly nerd sniped by it and posted this which i keep a link to for posterity: https://antirez.com/news/150

"Show HN: Using stylometry to find HN users with alternate account" (2022), 500 comments, https://news.ycombinator.com/item?id=33755016