I'll note that Greg Bear's Blood Music story (complete with 'grey goo' scenario) was published in 1983 (June issue of Analog SF magazine, edited by Stanley Schm

I'll note that Greg Bear's Blood Music story (complete with 'grey goo' scenario) was published in 1983 (June issue of Analog SF magazine, edited by Stanley Schmidt), three years before Drexler's book was printed. By another name, the 'grey goo' trope is older - if you dig into mid-20C comics (especially the horror subgenre), or even older SF, you'll find more than a few examples of the 'mass of protoplasm' that absorbs all organic life into itself.