I think this is the best way to look at projects like these. It's not an exercise in efficiency, or even attempting to prove that HTML + CSS is somehow better

I think this is the best way to look at projects like these. It's not an exercise in efficiency, or even attempting to prove that HTML + CSS is somehow better than a JS version. I think it's about getting as much as you can out of CSS and HTML. As a viewer, looking at these projects usually give me 2-3 tricks to add to my collection and is worth the read. I honestly don't think I'll ever NEED to implement a CSS+HTML calculator sans JS, but it's nice to know that it's possible and it could be something I look at if I want to implement a piece of it for something similar.