It has changed such that the "traditional" CHS order hasn't been the physical layout of HDDs for probably at least two decades now. Not long ago I posted an article with more details of that: https://news.ycombinator.com/item?id=39428728
I was thinking the lesson from CHS->LBA could be equally well drawn, without bringing in obsolete tech, by exercises involving H:M:S->S or perhaps even D.M.Y->Julian Day.