I mean, sort has put on some weight over the years, sure. But if it were packaged up for npm people would call it a micro-library and tell you to just copy it into your own code.
Yet, they are still a lot bigger than most micro-libraries. And more complex. And most of them tend to be parts of the same package (coreutils). So no, they have nothing in common with microlibraries. Not in concept, not in how they are used, shipped or maintained.
Yeah, the thing is that `yes` isn't a stand alone project, it is usually part of a bigger project such as coreutils (https://github.com/coreutils/coreutils/).
For the comparison to be valid you would have to split up coreutils into roughly 100 individual repositories and replace many of the implementations with ones that are trivial, buggy, and/or unmaintained that pose a supply chain attack risk because it gets hard to keep track of what's maintained, by whom and how. Coreutils is close to 100kLOC and its programs aren't packaged individually. It is far, far from the random mess that are microlibraries in NPM.
less (17kLOC), awk (43kLOC) and grep (4kLOC) are separate projects, but some of those require a bit more insight than much application code these days, so it makes sense that they are individual projects.
