Or maybe, as valid as the concepts might be, they have limited commercial applications.
IIRC it was Tesla who developed AC transmission, Westinghouse that incorporated it, then put it to wide scale use, and Edison who fought it tooth and nail before dropping DC and swamping the competition in the market. AC is precisely what created commercial applications of electricity.
Bingo. For example, it’s a neat trick to transmit power wirelessly, but as a general power delivery method, it’s unworkable in a society that wants to sell the electricity, because there is no feasible way to measure usage.