For me, the lightbulb cartel comes to mind in which leading manufacturers at the time agreed to limit the longevity of incandescent lightbulbs. (This is often c

For me, the lightbulb cartel comes to mind in which leading manufacturers at the time agreed to limit the longevity of incandescent lightbulbs. (This is often cited as an egregious case of planned obsolescence, but Technology Connections has a great video on this that explains there's more to it and it potentially reduced overall load on the electric grid.)