the biggest reason is that draw commands of the same color can be space efficient. another is that the NES had to deal with 56 colors while modern images use 8 bits per color channel (RGB) meannig it has to store a lot more data it doesnt necessarily need.
as someone who lives in a fairly densly populated area, malls are almost directly tied to income levels of the local populace. malls in poorer neoghborhoods closed. upscale malls in rich neighborhoods are still thriving.