Very true. Did some googling and the only places DC transmission is implemented commercially is for undersea transmission. It also appears that the greens are trying to push it for wind farms since they generally are in the middle of nowhere and produce DC that has to be converted at some point anyway.
I recall my Great Uncle, who had spent time with a large engineering firm on a project in Africa, talking about a DC transmission line from a hydroelectric plant to a smelting operation or some such thing... it was a process that utilized DC... perhaps electrolysis depositing copper or some metal trough galvanic action or what have you.
Those wind generators produce AC and it's low power at that.