" A universal law of economics says the moment something becomes free and ubiquitous, its position in the economic equation suddenly inverts. When nighttime electrical lighting was new and scarce, it was the poor who burned common candles. Later, when electricity became easily accessible and practically free, our preference flipped and candles at dinner became a sign of luxury. In "

― Kevin Kelly , The Inevitable: Understanding the 12 Technological Forces That Will Shape Our Future