I’m a big fan of Butterick’s book (and Butterick’s stuff in general), and one of the things I appreciate about his guidelines is that he does well at distinguishing between hard-and-fast rules and mere heuristics or suggestions. For example, here, he correctly says: “In this example, cell borders are unnecessary. In other cases, they can be useful.” (Emphasis mine.)
Butterick’s example table has a mere four rows and columns. A larger table simply can’t do without some visual delineation. (But take a look at the linked table, and you may note that it doesn’t have lines[1] either—it has alternating row background colors. Meanwhile, the columns need no delineation, because the human eye is better at vertical alignment than horizontal alignment!)
But of course even that needs a caveat: the table has no lines between rows of body content, but does have lines separating table sections. Similarly, you could vary the weight of the lines, to create visual organization, such as in the tables on this page.
I’m a big fan of Butterick’s book (and Butterick’s stuff in general), and one of the things I appreciate about his guidelines is that he does well at distinguishing between hard-and-fast rules and mere heuristics or suggestions. For example, here, he correctly says: “In this example, cell borders are unnecessary. In other cases, they can be useful.” (Emphasis mine.)
Butterick’s example table has a mere four rows and columns. A larger table simply can’t do without some visual delineation. (But take a look at the linked table, and you may note that it doesn’t have lines[1] either—it has alternating row background colors. Meanwhile, the columns need no delineation, because the human eye is better at vertical alignment than horizontal alignment!)
But of course even that needs a caveat: the table has no lines between rows of body content, but does have lines separating table sections. Similarly, you could vary the weight of the lines, to create visual organization, such as in the tables on this page.