The power distribution side of it has not changed much. Stepping voltages up and down at scale (kilowatts to hundreds of megawatts) is still much easier with A

The power distribution side of it has not changed much. Stepping voltages up and down at scale (kilowatts to hundreds of megawatts) is still much easier with AC and transformers, than DC-DC conversion using power electronics. On the grid DC transmission is only done where the gains in transmission efficiency and reduction in the amount of conductor needed can offset the substantial cost of the terminal equipment. Affordable solid-state DC-DC converters that could take the place of the typical substation or last-step utility pole transformer just don't exist.