[Silhouette]

It's a separate issue to CSS processing, but do you not find that tools like live-server or browsersync that hot-reload CSS changes are more efficient than manually refreshing the browser anyway? They update quicker than a full refresh, and if you're working on interactive web apps then they have the significant advantage that any other state you've set up doesn't get discarded while you experiment with styling.

[ivanhoe]

I use browsersync all the time, it's a great tool, but IMHO it's still much more hassle then just live editing css in chrome devtools and then having the browser save the changes to local css files directly. No need to reload anything, you just save it and you are free to continue working... of course, sass has many other benefits, it's a way easier to manage, but with devtools pure css workflow is nowadays really fast and streamlined, too.