Who cares what system was used so long ago.
If it had not been NeXT it would have been some thing else.
With all due respect, this has to be the dumbest comment in the thread, and it has plenty of competition!
The point was that NeXT was the first proper object oriented operating system, designed that way from the ground up. As such building a complex application in NeXT was (and still is, in many respects) much easier and quicker than on competing systems.
If it wasn't for that ease and simplicity, the web may have taken much longer to be developed, and possibly not developed and certainly not in the open form we know today!