All they need are slightly better admin controls, SSO, and a switch to disable anything "fun" in the client (maybe settable via a group policy if there feeling

All they need are slightly better admin controls, SSO, and a switch to disable anything "fun" in the client (maybe settable via a group policy if there feeling froggy), and Slack has literally nothing to offer. This is a relatively trivial amount of engineering work to have feature parity