@cnx yes i would like to embed them on my website but i don't want to do any of the following:
1) massively increase the size of the git repo that runs my website
2) write the code to generate derived sizes/resolutions
3) run the code to generate derived sizes/resolutions on every website change
4) write the javascript to embed them dynamically based on screen dpi and screen size
5) require a non-web-based workflow for publishing new images