[pc486]

To be fair, I believe the author is addressing a beginner audience for inexpensive displays commonly found today. These modern small displays have about 7 times more pixels than those older Nokia ones, which means the bandwidth to drive them in monochrome is the same as driving the color Nokia displays.

The advice of "if color, start with SPI" is simple and mostly correct. Good enough for a target audience of engineers just starting with hardware.