This still doesn't make sense to me. If seismic stability is a top-of-mind problem, why do they keep building new fabs in Taiwan? Why not move to diversify hig

This still doesn't make sense to me. If seismic stability is a top-of-mind problem, why do they keep building new fabs in Taiwan? Why not move to diversify higher-end production sooner? Why build in Arizona, a state which - while less seismically active than Taiwan - has multiple active faults and regular earthquakes? It really seems like "a place that's flat and has a relatively low occurrence of natural disasters" is more of a would-be-nice than a must-have.