The unglamorous half. None of it is visible when it is working, which is the point.
The chain
Source to encoder to origin to edge, with redundancy at each stage and a clear answer to what happens when any one of them disappears.
Monitoring
Silence detection, level monitoring and endpoint checks across every service. Alerts go to the people who can fix the cause, not to a dashboard nobody is looking at.
Capacity
Adding a fourth station was a configuration change rather than a deployment. That is the return on building the platform properly the first time.