Agreed. I have never had as good of an experience with IRC or XMPP as I have with slack. Open protocols are still great for open communities, internet discussion boards, etc. but when you're a multi-billion dollar messaging platform and companies are using you for critical communication I don't see any reason to continue supporting them. They've actually gone a step further and put the accessibility features in slack and upgraded their api to support things people used to do on the irc channels.