The post discusses a clever implementation of blurry image placeholders using only CSS, avoiding JavaScript for performance and minimalism. The technique leverages CSS variables and custom properties for generating light-weight, low-resolution images which serve as placeholders before high-resolution images load. User comments highlight the creativity of the approach while providing feedback on potential performance issues, especially with the use of certain CSS selectors that might impact rendering performance. There are also discussions on the limitations of the technique, such as the excessive blurriness and sluggishness on mobile devices, alongside suggestions for further applications of this concept in web design.