NEXTSTEP and the NeXT workstation was
"intended" to sweep all before
it. Including SunOS, Sun and other proprietary Unix workstations.
I doubt sweeping aside anything based on its being proprietary[%] was
part of the intent, especially since NeXTen included undocumented
hardware, notably the blitter, and NextStep included closed-source
components, notably the DPS server.
[%] Not _quite_ what you said, but your wording seems to indicate, to
me, that this is what you intended.
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