Good grief, man.
All that technology is documented ad infinitum
If computers and calculators no longer worked, would it take decades to manufacture mechanical calculators while we rebuild. I don't think so.
Most of the monumental works of American exceptionalism (the the Obum wants to take credit for) were built long before the age of computers and microelectronics.
My life has spanned both eras, and I refuse to join the luddites.
Yes, the tech is documented. But you have to have the tools to make the tech, and in case of EMP frying microchips, you need working tech from before the chip era. So, you’re talking mid-1960s tech. Except, to make THAT tech, you need the tools that built it, which haven’t been made or used for a generation plus.
It’s the “chicken or the egg” problem, writ large. . .you need a sufficient base of the machines to build the machines, and enough skilled operators to run them.
Oh. . .and how much of the documentation is physical, and how much was scanned and burned to CD/DVD to save space. . . or merely disposed of, by corporate. . .
We don't make much in the way of chips in the US right now. Most chips are made overseas (outside the reach of EPA bureaucrats). The equipment we use is mostly made elsewhere. We would have to buy a bunch of stuff and wait for shipment, but it would be there.