It's called planned obsolescence and while ridiculously wasteful, it's part of the reason why a 16mb video card cost over $1000 when it first came out. Today, it's junk.
That particular example is not really planned obsolescence. It's the result of hundreds of billions of dollars of investment by semiconductor companies and the work of hundreds of thousands of smart people around the world. Our ability to make silicon chips gets better year on year and things that were not possible to do a few years ago, or were at the limits of technology (and therefore difficult/expensive) can now be done cheaply & routinely.
Same thing applies in many other areas. Today's cars are hugely more fuel efficient (well outside the US anyway...) than those of 15-20 years ago, to the point where many people would get a fairly rapid payback by switching to a new one. That's not because evil car manufacturers deliberately made vehicles that would be out of date soon - it's because they are now able to put computers into the engine management systems.
I think the accumulated knowledge, skills, organisation etc. required to make most manufactured goods would be extremely difficult to re-acquire after
a long gap. E.g. think about Leonard Read's famous piece from 1958 about Pencils. https://en.wikisource.org/wiki/I,_Pencil
For densely populated places (like Britain), the reality is that our food production & distribution infrastructure is such that a couple of weeks without oil is likely to see nearly all of us starve. Something like a dozen diesel engines are involved in getting the average food product to us. While there might be plenty of unnecessary cars, there aren't huge amounts of spare trucks, refrigerated warehouses, mechanized farm equipment etc etc sitting idle.
It's an interesting thought experiment and it's something that's relatively easy to do on a personal level, much more difficult for society as a whole.