Don't get me wrong, I'm totally fine with the global philosophy of Core having just enough to boot and loading extensions....
In fact, after diggin' deeply into the filesystem I can't find anything relevant to prove my point, except for the legacy firmware in /lib, maybe.... (lots of network card models and... wacom? ... matrox??? omg matrox, really?

)
We could argue about which functionality from Busybox is not needed anymore (rpm, eject, etc..).
So, thanks again Jason, for solving my question about Squashfs-tools. Now that makes sense.