Here is a thing, already with NeXTSTEP, UNIX support wasn't never something worthwhile looking for, NeXTSTEP was used for its Objective-C tooling and frameworks, like Renderman and Improv.
The UNIX stuff was just a solution for having a quick ramp up for their OS development, and just like Microsoft with Windows 3.1 NT, to have a tick in the box when selling to the government,
Their famous commercial against Sun, hardly touches on UNIX like development.
You aren't going to see a CLI on that NeXTSTEP screen.
Just like the SDK is all about Objective-C related stuff, even the device drivers were written in Objective-C.
The only fouls here are those that keep giving their money to corporations instead of supporting Linux OEMs, as Microsoft cleverly discovered.
In fact, had either A/UX not been discontinued or Microsoft seriously supported their POSIX personality, Linux would never taken off, as the same crowd would be happily using these systems.