The only reason it made sense to transition to digital is the workflow. Its more efficient to shoot weddings on digital so you can turn out a product faster.
There are a lot of reasons it made sense: getting to see your photos instantly instead of waiting for (and paying for) film development, the ability to change the white balance after photos are taken, not lugging a bunch of film around, not worrying about airport x-rays ruining your film, getting a digital copy of your photos without using a scanner, and many other very big advantages.