As a nice crossover, the Economist predicted the number of blades to go to infinity in this beautiful graph: https://www.economist.com/science-and-technology/2006/03/16/....
And then there's this from 1992 - https://www.youtube.com/watch?v=YleuLyCUx28
I also have to give a shout out to the time they predicted the five blade razor a year before it came out: https://www.theonion.com/fuck-everything-were-doing-five-bla...