TSMC Adds $100 B to Arizona Build-Out, U.S. Commitment Hits $265 B

Silicon reshoring on this scale recalls Japan’s 1986 Toshiba–Westinghouse joint ventures and the 1940–45 U.S. wartime aircraft ramp-up—moments when strategic industries migrated to safeguard supply in geopolitically tense eras. Today’s AI boom, U.S.–China tech rivalry, and vulnerability of Taiwan’s fabs to a Strait conflict are steering capital toward continental redundancy, mirroring a century-long pattern: critical technologies drift toward the markets and militaries that finance them. If the bet pays off, Arizona could in the 2030s resemble Silicon Valley’s 1960s ascent, entrenching the Southwest as a chip hub for decades; if AI demand proves faddish, these $100 billion shells may echo the mothballed HDTV lines Japan wrote off in the early 2000s. Over a 100-year arc, the move underscores how compute capacity—much like steel in the 19th century or oil in the 20th—becomes a locus of national power, prompting states to subsidize and court the world’s dominant producer.