Nobody is denying that. But GP was saying that now with k8s developers don't need to know about the network. My rebuttal is that devs never had to do that. Now maybe even Ops people can ignore some of that part because many more things are automated or work out of the box. But the inner complexity of SDNs inside k8s in my opinion is higher than managing your typical star topology + L4 routing + L7 proxies you had to manage yourself back in the days.
I think a phone call analogy is apt here. Callers don’t have to understand the network. But they do have to understand that there is a network; they need to know to whom to address a call (i.e., what number to dial); and they need to know what to do when the call doesn’t go through.
Devs never had to do that because Moore's Law was still working, the internet was relatively small, and so most never had to run their software on more than one machine outside of some scientific use-cases. Different story now.
