Is CSS-in-JS really better than traditional CSS?

CSS in JS is a real ‘hotness’ and in many ways is very much a ‘thing’ nowadays when it comes to building applications on the web. I decided to test my ‘traditionalist’ sentiments with CSS and take on an experiment. I went in with an open mind to truly answer the question… is it really better than CSS?

I was pretty convinced I knew what was going to be the outcome. I have always…