These sorts of things always talk about progressive rendering. Who actually likes progressive decoding? Like...what year is it?

I don't want an image to appear in any form until its loaded. I never need to see a blurry placeholder, and there is zero value in that even with bad connections, but the situation is farcical when everyone has ultra-fast connections everywhere.

This is similar to pages that use custom fonts but will happily show the text as quickly as it can, and then suddenly restyle/relayout the page when the custom font loads (Flash of Unstyled Text - FOUT). It looks terrible and is jarring. Progressive rendered images are the same.