as i understand someone posted that the blade needs 48 hour reset period because of the metal or something, im not not sure but you cant use the same razor everyday because of thats and thats why they used to sell 7 day sets.... i may have misunderstood.
They sold 7 day sets because a well heeled gentleman of means would buy that. Kind of like wearing a Rolex in these times. Also agreed that letting a razor rest is just a myth.