Anyone who writes technical documentation about networking knows the key ranges, and at least TEST-NET-1 (192.0.2/24) is pretty easy to remember. You only gotta look it up a few times, instead of being sloppy and justifying so with “no one cares anyway”.

It partly because attitudes like that is why software is a mess. Too few people care about correct semantics, everyone is satisfied with whatever sticks. From lists for sets, to tag soup instead of markup, and so on - all the way to modern code slop.

</rant>