I'd researched this a few months back. Turns out, it's financially feasible (improbable, not impossible) but the alternatives are usually much better. The cost

I'd researched this a few months back. Turns out, it's financially feasible (improbable, not impossible) but the alternatives are usually much better. The costs are enormous, and there isn't enough political will to get it done. For most countries, investing that money into renewables provides is a better return. https://spectrum.ieee.org/lets-build-a-global-power-grid https://spectrum.ieee.org/lets-build-a-global-power-grid is a good read.