Yeah. And if you did want to analyze it using classical western tonality, then taking into account vocal melodies, quite a lot of it sits better in minor...
Power chords were quite heavily used by some of the bands Kurt liked and were easy to play, hence the stuff that sounded good when he was noodling used a lot of that. Nirvana weren't innovators in tonality, but they had great crunchy guitar tone, catchy hooks and a singer with a raspy voice - exactly what you'd expect a band that didn't care about music theory to potentially excel at, and exactly what was needed to breaking the trend in layered reverbs and guitar hero solos of the 80s ...
Power chords were quite heavily used by some of the bands Kurt liked and were easy to play, hence the stuff that sounded good when he was noodling used a lot of that. Nirvana weren't innovators in tonality, but they had great crunchy guitar tone, catchy hooks and a singer with a raspy voice - exactly what you'd expect a band that didn't care about music theory to potentially excel at, and exactly what was needed to breaking the trend in layered reverbs and guitar hero solos of the 80s ...