Slack is a walled garden. Their proprietary API is defined by them and only implemented by them. They can and will shut off parts you depend on (like the IRC+XMPP gateways that were just shut down). IRC is over 20 years old and software written for it then still works now. It’s implemented by hundreds of clients, servers, and bots. Your CI supports it and GitHub can send commit notifications to it. It’s ubiquitous and free. Use it!

Ich bin ja ganz froh, dass ich nicht gezwungen bin mit Slack zu arbeiten. Die meisten Leute in meinem Umfeld stöhnen über den miesen Electron Desktop Client und die kürzlich abgeschlatete IRC Bridge.