Maybe I'm pulling at a fake distinction here but the progenitor blog posts of this format that I'm thinking of were incorrect models of constructs that almost everyone uses in their everyday life constantly ( names, dates, time etc )

Whereas I find it kinda unlikely that someone both knows what a DHCP server is, and holds a belief that there is only ever exactly one on their network?

Hmmm, In my experience programmers are often not particularly good at networking, and this can result in all kinds of bad assumptions (or awkward workarounds for things that could be much better solved at the network level).