Inline styles don't work for a number of reasons:
- No pseudo class support
- No media query support
- Specificity issues
- You'll never stop writing CSS, bloat becomes a problem.
That being said, the approach functional CSS takes is quite similar to inline styles. It takes the main benefit of inline styles (being able to see what styles are applied to an element without having to look at a CSS file and do a lot of context switching) with the benefits of having a stylesheet. Best of both worlds.
