I first became aware of this phenomena when the film “A Fist Full Of Dollars” came out and with in a week every store was selling those ponchos. After that it was fad after fad all the way up until today.
Yup.
Google Lt. Col Dave Grossman (Ret.) on sheep, wolves, and sheepdogs.
I’m in the final category and my bite is definitely stronger than my bark!
When a movie is being made, it can take a year or more. Hundreds if not thousands of people can be involved, and a lot of them are experienced enough to know if something is likely to be successful enough to support those ‘fads’. So, they get to work - and then it’s ready, as you say, within a week.
I’m sure the same principle has always functioned in politics, finance, art and fashion, everywhere, from the beginning of human commerce.