Don't forget about possibly 4 different IRs per channel in a Cab.Mkl II has 1024 presets. There are 2 cabs with 4 channels each per preset = 8 possible IRs per preset.
1024 * 8 = 8192 IRs.
And that's not counting the IR Player(s).
1024 presets X 2 Cabs X 4 Channels/Cab X 4 IRs per Channel = the possibility of using 32,768 Cabs in your presets - lol!