One benefit that isn't often mentioned is better developer ergonomics. Styling with utility classes saves you from having to open a CSS and html document side b

One benefit that isn't often mentioned is better developer ergonomics. Styling with utility classes saves you from having to open a CSS and html document side by side (e.g. if you do layouts where it's helpful to see the html structure while writing css), which can make a huge difference if you also need a browser window for visual feedback.