Show them this comparison โ it really illustrates why cloud systems avoid exactly these kinds of problems https://www.mamboserver.com/blog/cloud-vs-pbx-communication-platforms-for-hosting-providers/ . The article goes deep into uptime, fault tolerance, cost of hardware failures, and how cloud platforms use distributed infrastructure to maintain continuity. For hosting providers especially, cloud communication systems can be far more stable because outages arenโt tied to a single physical device.