This was also the thing that attracted me to Elm years ago. But at that time Elm doesn't have a CSS module yet. Now with Elm-UI, it is like my dream HTML/CSS replacement.

However that was all for static UI though. Writing Elm app is still a pain if you are not a Javascript expert. Elm's implementation of the web API is minimal and the progress is extremely slow. In addition, most function that's in libraries in Javascript's ecosystem can not be directly used as you have to write Ports, which requires a lot of Javascript experience.