Sounds like some strong assumptions here, particularly a stable and non-metered connection. Imagine fast scroll across an image gallery on a slow connection (i

Sounds like some strong assumptions here, particularly a stable and non-metered connection. Imagine fast scroll across an image gallery on a slow connection (including cell handovers). Or range requests, where a service worker only downloads the header+preview portion, and when clicking on the image, no need to re-download that. Or even a browser that truncates all images, to protect users who might visit a page with huge background images that blows through their prepaid data plan. JPEG XL anticipated, and accommodates, these use cases.