but also because people have old vinyl disks which they can revive. and people complained about the cold sound of CDs forever. it's not like tech, where you don't really see people crying over their burnt memory chips.
Especially for audio connectors, i don't think it is a coincidence that the 3.5mm jacks and its fatter brother have not changed since forever. people wanted to use it with their older stuff.
Unless 3.5mm headphone jacks will be around in 50 years who knows.