I can't remember how long go it used to be when wedding clients bought prints ....even the Corporates started going to DVD files > so they can make prints at their own cost.
If I shoot 400 images > I best be delivering at least 365. I imagine most share on their email/net?
When the business started going to digital from film -- there was a period ( to compete) we just handed our undeveloped film to the B&G. It was standard practice around here for a few years. The new shooters ( with no processing /film expenses ) came in way under our proposals in the wedding business. They were not really pros- who had worked for decades in the business >> just weekend fun with their digital cameras > cost them nothing but time.
So to save overhead = we handed the film over, right from the camera . Especially for a small wedding party, in this destination spot >> just made sense. We were all hand-meter trained -- years behind the camera --shooters -- we knew the results of the images on the rolls of film.