This is a very good rule of thumb. Grid is great for the layout of the whole page (header/content/sidebar/footer) or specific gridded containers. Flexbox is g

This is a very good rule of thumb. Grid is great for the layout of the whole page (header/content/sidebar/footer) or specific gridded containers. Flexbox is great for everything else, and specifically what you said about in one dimension, like form label/input or a repeating set of thumbnails, or justified buttons.