Why Sony can't bring back the Walkman.

https://obsoletesony.substack.com/p/why-sony-cant-bring-back-classic-walkman

'The miniature motors, magnetic heads, optical pickups, and proprietary integrated circuits used by these players have gone out of production. Sony cannot pull an old bill of materials from its files and order everything again. Suppliers moved on, production equipment was retired, and some companies may no longer be in those businesses.'