Parts bin, economy of scale, shipping, inventory and labor time do not crossover well from manufacturing. On the other hand, I can buy pigtailed 2-diode lensed LEDs in a six pak for <$10, but the only ‘fixture’ using anything close to these is part of furniture or cabinetry that retails in the thousands yet I’ve never seen them as replacement parts!?
Everything is intended to be one-time use.
In the 1960s a VW bug needed constant maintenance. Replace heads at 50k-miles, lubing hinges every 2k-miles, brake adjustments etc etc. People developed the idea they were junk. YET if you did the factory maintenance the little car would last just about forever and the cost over time was very, very low. Most people didn’t do the maintenance and just bought Chevy vegas or datsun b210s
Today many countries mandate obsolescence and in the us we just go for the next thing we can finance
Can you imagine today if you could buy a beetle with crash technology, battery technology, resin technologies, etc and support the car with parts in perpetuity?! Eh, probably nobody but me would buy it. The closest thing is maybe tesla but that’s not economy-car priced. And certainly not intended to last for 25 years