> The continued widespread use of JPEG is evidence that many web publishers don't care that much about squeezing out a few bytes.
I agree with the second part (useless hero images at the top of every post demonstrate it), but not necessarily the first. JPEG is supported pretty much everywhere images are, and it’s the de facto default format for pictures. Most people won’t even know what format they’re using, let alone that they could compress it or use another one. In the words of Hank Hill:
> Do I look like I know what a JPEG is? I just want a picture of a god dang hot dog.
I agree with the second part (useless hero images at the top of every post demonstrate it), but not necessarily the first. JPEG is supported pretty much everywhere images are, and it’s the de facto default format for pictures. Most people won’t even know what format they’re using, let alone that they could compress it or use another one. In the words of Hank Hill:
> Do I look like I know what a JPEG is? I just want a picture of a god dang hot dog.
https://www.youtube.com/watch?v=EvKTOHVGNbg