There are literally hundreds of semiconductor fabs of various types and process nodes spread all around the world ( https://en.wikipedia.org/wiki/List_of_semiconductor_fabricat... ) and the most common chips are fabricated on older, larger process nodes anyway.
Those are facts, but the industry remains fragile. It didn't take much during Covid, and the Nexperia supply shock combined with DRAM shortages are doing a number on automotive right now.
And I imagine the chips manufactured on older larger process nodes would be subsumed to replace newer ones where possible, which cascades. But that's just conjecture on my part.
And I imagine the chips manufactured on older larger process nodes would be subsumed to replace newer ones where possible, which cascades. But that's just conjecture on my part.