These are indeed good examples of things that are merely tools, not fundamental knowledge.
Time-transport me an expert C programmer from the 80s and I'll have them productive in Go in two weeks. It's all very familiar territory.
O send me a mainframe programmer from the 60s and they'll be up to speed on kubernetes in short order. Pushing your workload to a remote cloud (mainframe) won't be exactly be new to them.
Databases have been studied and their properties understood for a very long time.
Sure, the exact details vary a bit and the command line options are different, but that's not significant.