Totally disagree with this sentiment (that CSS will always need to be pre-processed). In many cases today it isn't necessary, even for fairly complex projects.

Totally disagree with this sentiment (that CSS will always need to be pre-processed). In many cases today it isn't necessary, even for fairly complex projects. This (nesting) is one of the last issues that causes me to reach for a pre-processor, honestly. So (IMO) we should absolutely be looking for what makes the most sense for human devs to write and read, and that should be the default for the base language that the browsers can interpret. We can always make it smaller via minification, etc.