When NeXT acquired Apple (for one Steve Jobs, getting $400 million as change) OPENSTEP was not dated - it still looked impressive next to MacOS 9 and Windows. And CDE, of course, but that’s a very low bar.
It didn't look as great as Irix did back then, though ..
Anyway, its all about that alternative-universe, where the success of the SGI tiBook has everyone running Irix in their pockets ..