My favorite use was during my PhD. My thesis could be regenerated from the source data, through to creating plots with gnuplot/GRI and finally assembled from the Latex and eps files into the final pdf.
It was quite simple really, but really powerful to be able to tweak/replace a dataset hit make, and have a fully updated version of my thesis ready to go.
It was quite simple really, but really powerful to be able to tweak/replace a dataset hit make, and have a fully updated version of my thesis ready to go.