1. You can terminate the loading process as soon as you're satisfied with the quality. It's just that browser don't do that. 2. The OPs JPEG-Clear proposal [1]

1. You can terminate the loading process as soon as you're satisfied with the quality. It's just that browser don't do that. 2. The OPs JPEG-Clear proposal [1] also loads the entire file no matter what. It's literally just a reinvention of progressive JPEGs, presenting it as something novel. [1] https://johncostella.com/jpegclear/ https://johncostella.com/jpegclear/