>why offload the variable resolution to the client side when it can be done at compilation time? So I can use Stylus to override one CSS variable and change th

>why offload the variable resolution to the client side when it can be done at compilation time? So I can use Stylus to override one CSS variable and change the appearance, instead of having to save the website's entire css file, find all rules set to the "variable value" (aka a particular font stack), and redefine every rule to use my personal font stack.