Depends on the user. Some users are more sensitive for flashing images. Some users have very slow or unreliable network connection. Some sites have bigger image

Depends on the user. Some users are more sensitive for flashing images. Some users have very slow or unreliable network connection. Some sites have bigger images. Some sites (such as ecommerce) have higher quality and resolution needs. Some users have uncorrected astigmatism. In the general population, the average uncorrected astigmatism typically falls between 0.50 and 0.75 diopters (D), and ~15 % more than 1.0. The high astigmatism people will see images blurred in any case and don't benefit from the fine structural detail JPEG XL can give. People with glasses and the lucky ones with low astigmatism will see the details clearly. Sometimes passionate ends of different quality of vision seem to have a discussion on what makes sense as the web quality, with one emphasizing quality 40 being more than enough and another requesting a quality of 95. The same kind of individualism exist also in temporal cognition and perception.