Which measurement is easier and comfortable for the designer/developer to use when coding their CSS but does not provide the best experience for the user?

The use of pixels (px) as a measurement in CSS is often favored by designers and developers for its simplicity and precision. Since pixels are an absolute unit of measure, they provide a fixed size for elements on a web page, making it easy for developers to create layouts and ensure that designs appear exactly as intended on all devices. This makes the coding process straightforward and allows for precise control over design elements.

However, while pixels are easy for developers to use, they do not adapt well to different screen sizes or user preferences. Users may have different settings for font sizes or screen resolutions, and a design based entirely on pixels can lead to a poor experience for those who rely on resizing text or using specialized devices. In contrast, relative units like percentages, rems, and ems allow for better scalability and adaptability, making designs more accessible and user-friendly.

Therefore, while utilizing pixels can simplify the coding process, it ultimately does not provide the optimal experience for the end user in terms of responsiveness and accessibility.