Are you talking specifically about wedding photography? If so, then , yes, there is an expectation nowadays that people can review and see images the same day. Not impossible with film but a lot easier with digital.
As to the other forms of photography, do you think that purchasers care whether an image was captured on film or digital? They may well care about the longetivity of the print, an area where analogue can claim superior results based on experience.
I don't sell many prints, so this is not a problem for me. Maybe you do? Do many of your customers raise these issues.