Another data point to the curious case of the unreasonable effectiveness of a 2D rows-columns rectangle of data. Looks like a 2D rows-columns structure is simpl

Another data point to the curious case of the unreasonable effectiveness of a 2D rows-columns rectangle of data. Looks like a 2D rows-columns structure is simple enough yet sufficient to cover 1) a matrix, 2) an Excel spreadsheet, 3) an SQL table, 4) a directed graph of nodes and edges.