alt Hacker NewsI was going to point out VoLTE as an example of a system which runs over IP but still retains a lot of the concepts from circuit switched days. In theory (if you’re a network operator), you could expose dedicated bearer provisioning with QoS guarantees for applications to build on top of. I guess my point is that you can have tighter QoS control if you can get off the public internet and go through carrier IPX instead.
VoLTE and SIP do indeed retail a lot of the concepts of circuit switched. The challenge is that now you have the complexity of (seemingly invariably) a Telco managing a k8s stack on an OS they don't understand, and which has hundreds of CVEs per month they aren't patching. The failure modes of VoLTE/SIP are also a load more complex than CS domain issues - IMS interop issues and XML parsing delights await!
So I guess it's not only about getting off the internet - there is a real shift in complexity in these more modern stacks too.