I happen to have tried this multiple times. Every now and again I want to erase all trace of me on the internet. HN doesn't allow it. They tell you that you can give a spreadsheet with comment ids and how you want to rephrase things in case you've given TMI about yourself (in order to anonymize). I just don't have the time to go through my entire history to do this. So I attempt to post less, knowing I don't own my comments and I can be tracked
Perhaps if HN eventually improves in this area then we will have all the proof we need that it is in fact becoming more and more like Reddit. Because it seems like a lot of the discourse is already checking a lot of those other boxes.
Reddit is actually a lot better in this regard