I'd like to see how HN would be without karma, voting and pseudonyms.
Just plain comments, maybe with a hide feature, so that you can remove stuff you don't care for.
I mean most people here request sources to statements anyway. And votes/karma/pseudonyms just distort the opinions of the readers. Some people even use throwaway accounts, so their opinions don't strain their main pseudonyms, which they thoughtfully form or down vote stuff they simply don't like.