What about HN doesn't comply with GDPR? It does not seem to have tracking cookies.
I'm someone who goes to somewhat absurd lengths to avoid tracking, but HN's policy doesn't bother me because I know the data exists elsewhere and deleting it here won't make a jot of difference to that.
If I'm reading a thread about a problem I'm having in a video game on Reddit and it goes "This is very frustrating because I can't get a rabbit to teleport", then a reply which is [deleted] and then "Oh! Thanks so much, I'd never have figured that out" I'm in exactly the same place as the original poster, but now with the additional agony of knowing that there was a correct solution and that it's hard to figure out what it is - ugh.