Yeah well... depends on your previous knowledge and perspective. To me, all these are models, and models are described by equations, concepts are often misleading. Besides, everybody uses a different language here, so when someone puts that into an equation, at least I can commit that to memory. Relations between variables in an equation don't lie. The rest...
I was referring to the way money is spend to get storage for your pictures.

I'm a rusty physicist, with half finished master degree in computer science that has been working with software engineers, particularity in the web environment, for more than a decade. This is why I like formulas and more or less know strategies to optimize webpages storage needs.