This is useful even for those of us who have been around for "a decade or longer." We page out of memory the things we don't use very often. Moreover, modern C

This is useful even for those of us who have been around for "a decade or longer." We page out of memory the things we don't use very often. Moreover, modern CS education teaches a lot of things that weren't taught in the past, and it likely only gives a hand-wave to things like memory-management etiquette in low-level C (or Go) API design. This is likely because (1) it's not that difficult to read up on the specifics if you're otherwise a competent engineer and (2) other concepts were valued higher. Perhaps the course focused on writing code with borrow-checking in mind instead.