It would take some pretty interesting circumstances for me to argue that using raw CSS is a good idea. As I've said before, the language has plenty of flaws, and using plain CSS without a preprocessor would be, in the majority of cases, irresponsible. Sorry for any confusion.
Thanks to CSS not having that from the start, it led to the situation we have today, where there are at least two different preprocessors to choose from: Sass and Less
Having two solutions is worse than having one solution, and we can credit CSS for creating this situation by not having its own.
