Earlier quoted context omitted.
This comment is Dunning-Kruger effect in action… Believe it or not, but maintaining an electricity grid is a massive undertaking, and the people in charge of it knows the topic much better than you do. The problem isn't a market problem, it's a physics problem: having a synchronized grid of AC current with many producers over a wide area is a real challenge, even when the underlying issue is resolved it takes a lot o…
Having such interdependent grids seems like a market or political problem not a physics problem to me.
The bigger the grid, the more efficient and resilient it is (and managing electric grids on islands is a nightmare), but it comes with a significant complexity and means restarting from zero is harder.