> The mental maps we carry are dominated by a single, misleading image: The Cloud.

> To break free of the center, you must also let go of the concept of the "Address".

When I was still dealing primarily with on-prem networks in regulated environments (or cloud networks stubbornly architected in a fashion similar to on-prem ones) I worked with a lot of people that could not and would not ever understand this. It's not just a cloud thing. Some people just cling to using IP addresses for everything all the time. They don't understand why trying to access the JIRA server via IP wouldn't work because they didn't understand SNI let alone a Host Header. Dynamic record registration and default suffix settings are nothing more than a section of settings to be cruised over during clicked-in configuration. Zones can and should be split without regard for architecture or usage. Et cetera.

My theory is that because these people didn't understand Layer 7 stuff like HTTP or DNS they just fall back to what they can look at in a console (Cisco ASA, AWS, or otherwise). IPv6 will simplify a lot of the NAT stuff but it won't cure these people of using network addresses as a crutch. Not really sure what the systemic solution is - I was like this once but was fortunate enough to be task with migrating a set of BIND servers to the cloud and so learned DNS by the seat of my pants. Maybe certification exams should emphasize this aspect of networking more.