Experienced Excel users will appreciate that textboxes default to having a border and white background. That‘s because they are often used to add comments or guidance to a user and so have to stand out. Otherwise a user would be foolish not to type words directly into the spreadsheet‘s cells. As equations can only be created in textboxes, the default settings are somewhat different; there is no border and no fill.
Another way to use a spreadsheet program that has become popular is to re-create 8-bit graphics from childhood video games and turn them into larger-than-life scenes. It‘s very simple to adjust the row and column height so that it becomes a perfect square, and most of the 8-bit games lacked any sort of definition, shading, or blending making them even easier to turn into spreadsheet art. There is also a huge market for this sort of thing. People that grew up with those types of games are now into adulthood, and many of them love to share things from their past with their children, nieces, nephews, and anyone else that cares about it. There is a certain amount of whimsy to these characters as well, and this type of classicism will never truly go out of style.