I learned electronics and dataflow languages before I learned traditional languages, and learning how modern systems were architected was horrifying to me. The level of separation of components is nowhere close to what's possible, because—as the author points out—the default level of abstraction in modern programming languages is the function.
Don't read this article as a critique of types (as in: typed vs untyped), but as a finger pointing at a higher level of abstraction that isn't a first-class concept in the tooling used to architect large systems today.
All that said, I have come across many people beating this drum over the years—usually Alan Kay or Ted Nelson types—and I suspect there's something they're missing as well.