Why does the US still have multiple power grids?

Question

I understand why the contiguous United States developed the East/West/Texas power grids but why have we never connected them to operate as one power grid?

In: Engineering

Answer 1

Huh? Why would having 1 power grid be beneficial?

Remember the Northeast USA blackouts in the 1960s and 2000s? Do you want a nationwide blackout?

And no, I don’t want to hear any redditor say they don’t remember the 2000s blackout. That is purely a rhetorical question.