Great stuff Steven, both blogs so far. I really like the way you're explaining models and showing how YANG is just that for network configurations. Abstractions are everywhere in computer science from programming languages to tensorflow graphs. Very similar to how exponents build upon multiplication which builds upon arithmetic. Turtles all the way down! It's nice to see it now being applied more to the networking world and to see how you are also considering heterogeneous environments. I'm really interested to see how you can use Jenkins and things like this in NetDevOps so hoping you have some more material on that coming in the future!