The hardware was sold to Mitsubishi or Canon (can't remember) and the OS was bought by Apple.
MAC OS X has taken over many ideas from NextStep.
The NeXt was miles ahead of any computer at that time and therefore nobody wanted it because nobody was knowing how to really use it.
In fact it is the same fate that occured to the Apple LISA computer. (Precedessor of Apple MAC).
I know thet the ministary of education in Luxembourg had it's offices equipped with NeXt computers.
bye Manou