Demand for X goes up when prices for X go down. First day of Econ 101. If X consists of two complementary components, A and B, then if the price for either A

Demand for X goes up when prices for X go down. First day of Econ 101. If X consists of two complementary components, A and B, then if the price for either A or B goes down, then the total price for X goes down, demand for X goes up. Which means demand for A and B went up. Even if the price of only one of A or B went down. So if the price of A goes down, demand for B goes up. If software prices go down, then demand for the hardware to run that software on goes up.