Look at all the new features email has!

Of course as we're on HN we obviously hate anything but plain text, but that's not true of most people

Chat should be the deadest-simplest protocol/app on the planet. It’s sending text… That’s pretty much the first thing a developer learns how to do when they learn network programming. We should be able to send text from one computer to another in a way that is compatible no matter what company’s client you use. Yet nothing has managed to gain traction.

And it's plagued with spam and attacks and fakes.

Chat is sending text, and files, and encryption, and now doing all that to groups of people, which means you need group managers and permissions, and authentication of those users. Might as well add video and audio calls now you have an address book, as phone companies can't do that properly it seems