"For the last word I'll hand over to John Carmack, Technical Director of ID Software, who used NeXTSTEP to develop Doom and parts of Quake (that's right!): "We developed lots of products under dos (mostly borland c++), and never want to again. We went through five major iterations of our tools under DOS, and they are all junk below our first iteration of NS tools. You can't really just point at specific things and claim superiority. It is the complete package that has the appeal. NS is the best tool I have found for MY development work."

from http://www.paullynch.org/NeXTSTEP/NeXTSTEP.TechReview.html