What do we KNOW about planned obsolescence?

Raqymond Loewy , a designer of the 1940'through the late 1980's (I believe he died in the 1990"s) and Brooks Stevens , gave life to the concept in autos in the US. The term of planned obsolescence goes back earlier but Stevens defined it in furniture and autos (Loewy and he did the coke bottle and the STudebaker , and severqal other designs) The idea was to create consumer desire by the manufacturere always promoting a product that was a little newer than the previous model.
Cars were the major product in which planned obsolescence was built in to the design

Id go look up Brooks Stevens and Raymond Loewy.

The recent series "MAd MEn" was about advertising industry execs who lived in the years where planned obsolescence was a given in design.
Thats where somke of these godawful kitchen colors like beige and avocado came about. They were design colors in appliances that , once installed, immediately doomed a room to about a 10 year duration of life when the household leader would want to "remodel" and buy new appliances (the next colors were black and metal)