It's hard to imagine all advanced semiconductor manufacturing wiped out, worldwide.
But: it's even harder to imagine existing high-tech equipment destroyed, worldwide. A significant % would likely survive. Remember there's like 100B+ cpu's in the world out there.
Starting from there, it would be more like a logistics bottleneck. Like when Covid pandemic hit, or that ship got stuck in the Suez canal. Possibly worse. But manageable.
In short: an event catastrophic enough to nuke that 'installed base', would be extinction-level where "will any humans survive?" would be more relevant than "can we make new cpu's?".
But: it's even harder to imagine existing high-tech equipment destroyed, worldwide. A significant % would likely survive. Remember there's like 100B+ cpu's in the world out there.
Starting from there, it would be more like a logistics bottleneck. Like when Covid pandemic hit, or that ship got stuck in the Suez canal. Possibly worse. But manageable.
In short: an event catastrophic enough to nuke that 'installed base', would be extinction-level where "will any humans survive?" would be more relevant than "can we make new cpu's?".