Just because the music press and critics were unkind to fusion, and the record companies saw $$, and it was watered until it became 'fusak', does not mean it was a dead end genre. It was killed off.
It was a vital form of music then, despite what the press claimed, and with the influx of self produced releases, still is.
Starting in the mid-90's, fusion started to make a comeback that has not let up. The list of young world class muisicans making incredible fusion is probably longer than back in the heyday of the 70's.