I actually went through a phase after realising this of outputing strings of utility classes to named variables to essentially emultate the benfits of CSS class names. My next realisation was that I might as well just be writing plain CSS. In the end I recognised that the things I actually liked about functional CSS were more or less the same things I liked about CSS-in-JS: colocating styles and markup (albeit with blocks of css rather than utility classes) and the approximate scoping of styles. I ended up writing a build tool that fascilitates this outside of React / JS.