Why Zelda Bet on Havok and a Homegrown Chemistry Engine: The Weak-Switch Physics Lab Behind 58M Copies

Why Nintendo EPD built BOTW (35.76M) and TOTK (22.71M, 10M in 3 days) on proprietary tech plus modified Havok instead of Unreal, what chemistry engine and Ultrahand gained and cost on 197-GFLOPS Switch, and what indie devs can steal — with original analysis and browser trainers.