On: Age and the entrepreneur, part 1: Some data

Bizjets have been using those materials and avionics for years.

If you want to talk about all new designs and brilliance in aerospace, look at Burt Rutan.

You're right, there is innovation in that industry.

And the point is: if a generalization about an industry is incorrect, it's not a good idea to use that as a logical foundation for predicting the age of entrepreneurs in that industry.