You're right that size ≠ complexity. However there's a vast difference between a web page with some fancy CSS and some JavaScript demo scene project. You can h

You're right that size ≠ complexity. However there's a vast difference between a web page with some fancy CSS and some JavaScript demo scene project. You can have a very fancy looking page with a few KB of CSS that will render just fine on even low end modern devices. You'd have to go back almost a decade to find devices that would struggle on such non-demoscene-yet-fancy CSS. Layout engines in browsers are pretty efficient and a fancy looking page without a bunch of JavaScript churning in the background fucking with the DOM or making a bunch of requests is not that demanding. The CSS Zen Garden [0] did some fancy ass layouts with CSS 2 and launched in 2003 running on browsers and computers far shittier than today's low end phones and PCs. With CSS3's advancements like transforms, transparencies, and animations there's a lot of effects that can be done entirely in CSS that those old designs needed images to do. [0] https://github.com/mezzoblue/csszengarden.com https://github.com/mezzoblue/csszengarden.com