Those are systems for Apple to control you and their devices that you paid for, not for you to control any device that you own. Therefore, the only traction they've really gotten is with one single user - Apple.
Probably worth pointing out a significant portion of the BSD "personality" in the XNU kernel is just straight FreeBSD. You could kind of say XNU is a superset of the FreeBSD kernel.
On top of that, the unix userland resembles FreeBSD, although it's pretty eclectic in choices, e.g. it ships with GNU grep and GNU make by default IIRC while I think FreeBSD uses BSD grep and make by default?
(Darwin is pretty eclectic overall -- some portions are more NetBSDish. Kernel is mostly Free I think)
IME, most of the basic shell commands are either directly from FreeBSD or a project in the BSD universe. For example tar is from libarchive, a distinct project (see https://github.com/libarchive/libarchive) that DragonflyBSD, FreeBSD, NetBSD, and macOS import and track. (But oddly not OpenBSD, which has evolved the 4.4BSD-Lite implementation.)
Yeah, I'm just an idiot. I guess I was just thinking of GNU make.
On the other hand, it looks like (at least on Catalina?) it ships with GNU diffutils, so patch, cmp, diff are all GNU utilities. I'm going to sheepishly pretend like this proves my point somehow :-)
A little late to the party, but- MacOS has actually beaten FreeBSD to the punch by shipping with bsdgrep as grep for years at this point.
FreeBSD should be able to switch before 13.0, but the bsdgrep developer is a slacker. It's only missing a couple of GNU extensions that are somewhat surprisingly (to me) common.
Those are systems for Apple to control you and their devices that you paid for, not for you to control any device that you own. Therefore, the only traction they've really gotten is with one single user - Apple.
> macOS
For now.
(Relax everybody, I'm at least half kidding.)