o/h in a large, global company: "both Zoom and Google Meet are blocked on our systems, we only support Teams" The reason (via a different company's CTO): "we don't want to have to support more than one thing" (nothing to do with security, etc). You do realise you're re-privatising the *telephone* into a walled garden? Am sure many of you will recognised this pattern: it's interoperability regression.