Companies have other concerns than the immediate revenues though. Consumers are very sensitive to price fluctuations, it might makes sense short term to raise

Companies have other concerns than the immediate revenues though. Consumers are very sensitive to price fluctuations, it might makes sense short term to raise the price when demand outstrips supply, but consumers will remember the companies that "gouged" them. Apple maybe would be able to get away with it, but for big companies having stable price is pretty important.