A couple of the fitters had no grey hair, and the age profile didn't look greatly different from the factory where I work. It must be remembered that people are living longer, being fitter for a given age and retiring later. We have an age range from 23 to 84 on the shop floor where I work, with pretty even numbers in each decade 30's-70's.
As for the modern implementation of old techniques, yes, I absolutely agree. Proper job.
Anyway, thanks for the link. Fascinating.
Regards,
Richard