No. That all assumes we'll be able to produce computers during energy contraction.
Long term, it does make that assumption, but not short term. As others have pointed out there are so many chips out there that could do the job necessary (ie. not at the level that it is being done today, but still enough for the transfer of information), that we could last a very long time simply by reusing and repairing those parts.
No one has demonstrated how you can produce computers without massive inputs of cheap easy fossil fuels.
I actually think that they have: nuclear power, for instance. Hydro. Solar. But we've been through that all through this thread. It may be more expensive to do so, but not nearly enough more expensive to warrant not using them at all.
Robo, the question I've been trying to raise -- and it fascinates me that almost everyone talks right past it -- is whether it will make any kind of economic sense to keep the internet going in a deindustrial future.
One of the reasons that not many people want to engage you on that topic is that they see no reason to believe that there will
be a deindustrial future.
But further to that, a future without cheap sources of energy isn't one where we throw away what useful technology we have, it's one where we simply have more limited resources. If your doomsday scenario plays out, those with access to power sources will still make use of them, and there's no reason I can see not to use them to produce computers.
So that leads us to your next point: ie. will those computers be the most efficient or valuable use of that energy?
The problem with that logic is simply that if the necessary jobs can be done more economically by some other means in an energy-constrained future, then they will be done that other way.
Sure, but you haven't show any more economical ways to do those jobs. An energy-constrained future isn't one without any energy at all, it's just one in which energy is more expensive than it is today. Given that, you need to look at the
actual energy needs of a scaled down internet that nevertheless can allow information flow at high speed.
In a world where half the surviving population farms for a living and energy supplies are tightly constrained in concentration as well as quantity, there are many better ways to handle information flow than vast server farms that burn through as much electricity as a small city!
Sure, but as others pointed out, you haven't shown that current server farms use that much energy, and, more to the point, even if they do, there's no need for them to do so in order for the internet to survive.
That is, and this is a very important point which many people have brought up and you have failed to address so far: the
current energy expenditure of "the internet" and the
necessary energy expenditure of a post-apocalyptic internet are two very different numbers. But even with that second much smaller number, the internet will still have survived.
So, if you want to suggest that the internet
won't survive, it's that second number that you need to address.
A shortwave radio net, using packet methods as long as computers are available, and downshifting to more human-centered methods as human labor becomes cheaper than concentrated energy, is one obvious choice.
Human labour will never become cheaper than concentrated energy in the way you mean, because human labour
is energy.