And i believe you can't downvote direct replies to your messages, which i think is great. Either you provide an answer, or ignore the comment. The downvote flamewars are avoided either way.
By far the most important for me is the absence of notifications. I avoid Reddit most of the time because there's no option to turn off notifications, or even clear notifications without reading them. Your only option is to click the button that takes you to the page with the reply to your comment.
> or even clear notifications without reading them. Your only option is to click the button that takes you to the page with the reply to your comment.
As a "clear" feature, you can always open that page in a new (background) tab, let it load so Reddit thinks you saw it, then close the tab without ever looking at the content. No idea if this works on new.reddit, but it's possible on old.reddit.
Also seeing the whole thread started by your reply. Reddit notifications make it feel like a 1:1 conversation, while HN encourages true many:many threads