Earlier quoted context omitted.
> the longer a speaker is used by the customer, the lower its CO₂ footprint if a rich audiophile replaces his speakers every year with the latest and greatest, and his old speakers get passed down the food chain to other audiophiles with lower budgets, what falls off the other end of the chain is a very old speaker which whose carbon foot print has been amortized over 10 years or more, and a better listening experien…
This is Reaganomics [1], but for speakers. There's just a handful of audiophiles that would be replacing their speakers every year, so there would be hardly any "downflow" of quality second-hand speakers. And repairability just means that the industry can move people from manufacturing to service and support. [1] https://en.wikipedia.org/wiki/Reaganomics
>There's just a handful of audiophiles that would be replacing their speakers every year
then the carbon footprint is negligible also, which is what this discussion is about, not total sales of high end speakers
but if you were a more flexible thinker, you would have noted that the explanation I gave works at any level of the product stream and it illustrates how economic activity works "at the margin" all the time; the carbon footprint argument I'm explaining against did not take this into account and gave an incorrect picture of the carbon situation.
"at the margin" is a related idea to differentials/derivatives in calculus, with a mix of brownian motion or statistical mechanics. Consider the idea that "the economy is so bad, PhD's are driving taxis". If a university opens up in that town and hires a bunch of PhDs, they wouldn't be driving taxis any more. those jobs would be filled by other people who used to be doing other things, and those jobs would in turn be filled. This is not Reagonomics, it's economics.