[wlesieutre]

The other big caveat being that for both AC and DC, you want to do long distance transmission at very high voltages. DC transmission has been put to real world use (converted back to AC into the grid), and it tends to be on the order of 100,000 to 1,000,000 volts.

Historically, AC was much more feasible to do this with because you can change the voltage with transformers, which are basically paired coils of copper wire. These days we have the capability to convert between AC and high voltage DC, but it's still requires comparatively complicated equipment and isn't as reliable.