I have not encountered many box-and-whisker plots or histograms in the course of my work, nor on other dashboards. I find them easy to understand and useful as a visual representation of distribution data. I think that histograms are probably easy for broad audiences to understand but box-and-whisker plots may be less intuitive for lay audiences. Box-and-whisker plots are probably more useful in academic settings and for audiences with some background in statistics and/or research.