Just as the title says , why do they make SACD hybrid CDs . It seems to me that if you just had only a redbook CD player , you would only buy a redbook cd of whatever title you wanted and save a lot of money . Likewise, if you had a SACD player , why not just buy a single layer SACD CD . It seems to me that it would be cheaper to make a single layer SACD disc which the savings could be past on to the consumer . I know this seems like a dumb question , but I sure would like to know the reason as to why they make these hybrid CDs .