Well i don't have links at hand but there's been plenty of studies in different fields (computers, cars) and overall the environmental costs of new hardware are

Well i don't have links at hand but there's been plenty of studies in different fields (computers, cars) and overall the environmental costs of new hardware are always (to my knowledge) greater than the environmental costs of keeping inefficient hardware around. For example, it will without any doubt take more energy/ressources to build a Raspberry Pi than to keep your old desktop computer powered. However, from an economic perspective the opposite is true because as consumers we pay energy far greater prices than the industry does. Which means i can buy a raspberry pi for the price in electricity that my desktop would consume in a few years. That device will then use a lot less energy to run, but took so much to produce it's meaningless. That is, without even taking into consideration recycling concerns. Recycling for electronics mostly doesn't exist (see open-air landfills with children taking metals apart using dangerous chemicals), and in any case also requires energy/resources and produces pollution. We are economically incentivized to destroy the planet. All those "buy a new car" programs are not meant to save the planet, they're meant to save big corp profits by keeping everyone buying new stuff. That's what is really worrying in my view.