And history. And search. And attachments. And video calls. And a decent experience for non-power-users. And a decent integration/API story. And multi-person DMs

And history. And search. And attachments. And video calls. And a decent experience for non-power-users. And a decent integration/API story. And multi-person DMs. All of which are immensely useful features. I get that HN likes to think "it's just chat", but a decent chat application (having used gChat, Slack, IRC, AIM, …) is way more nuanced than that.