There is no doubt any elec grids we have could likely be run more or designed more efficiently, but I take issue with the great need to get off fossil fuels, which in the US, have become far more efficient and cleaner. Wind and solar are not economical without subsidies.
Wind and solar are not economical with subsidies. How do subsidies render them economical? The necessity of subsidies is prima facie evidence that they are not economical.