Take this with a grain of salt - I'm no academic musician: By the time Nevermind was done, there were afaik easier techniques for the composition of popsongs available. Also, using the "contrapoint"-principe would probably have resulted in either quite outworn or very unusual compositions - the counterpoint was used to evade dissonance, but in the 90s dissonances were common in rock music. An example for a modern musician who vocally used the contrapoint technique in a modern way was "Moondog": https://www.youtube.com/watch?v=I7TPYWD8LUY https://www.youtube.com/watch?v=RW8SBwGNcF8

I guess it is, going off the Wikipedia definition! I'm very much interested in this thread and any Nirvana talk :)