The modern web design world is screaming "white space" more than ever, and for good reason. There are countless articles detailing how and why white space should be used.
I specialize in heavy-use, efficient single page applications that are built for production-oriented users. In other words, the users are not consumer and have the time to actually learn to use the applications, and use them for blood.
As part of this, the applications require a tremendous amount of functionality.
I am in a constant struggle between design and usability on these systems, as they pose different sorts of problems.
For example, the Google Material Design spec looks and works brilliantly for consumer-end interfaces that don't require that much dedicated functionality. As soon as you try to neatly sqeeze in a ton of other functions, it doesn't pan out so well.
I have looked far and wide for design principles for more production-intensive web applications, but find surprisingly little material on this.
My search goes on for a happy-medium - an elegant but outstandingly efficient production-app standard.