Thinner DVD cases, making more room

The collector in me resisted my activity today, but I began to pull my dvds out of their original cases and put them into thinner cases. I'd move the cover, although I'd usually have to fold it a bit. The outcome is that in just a couple of hours, I removed at least two linear feet of cases from my collection. Once I finish, I expect to remove three times that much. This stack of cases is 4 feet high and was replaced by about 18 inches of thin cases.