Am I the only one who would rather not have a single unified case for every cartridge?
You are not alone, for me
nes, snes, n64 can be in same dimension case.
gamecube, wii, wii u, ps2, ps3, xb360, in same one
PlayStation 1 and dreamcast in jewel cases
And so on, it has to be the same case or at least something similar to the original, talking of the dimensions