Sorry I wasn't being clear. AC is used for connecting within areas of densely populated cities, e.g. British National Grid. If we are talking about really long distances (> hundreds of kilometers), HVDC is indeed preferred.
I was talking about a trend of some factories replacing AC from power grids (possibility generated in nearby cities) with DC from solar panels on their rooftops. So it's a long distance compared to that.
Well, it depends on your definition of truth and it could be the absolute truth by definition. A theorem is absolutely true in the same way that "a bachelor is an unmarried man" is categorically true.