An angle I rarely see in these sorts of discussions is how efficient is the construction of newer devices – i.e. do they use significantly less material? Like d

An angle I rarely see in these sorts of discussions is how efficient is the construction of newer devices – i.e. do they use significantly less material? Like do new toasters use half the material of old toasters, or something. This would make it cheaper, but also potentially more environmentally friendly. Also, perhaps newer items are more mass-producible and therefore allow more people to have them in the first place.