I haven’t used film since 1999 and I will never go back for the reasons listed below:
I don’t have to limit the amount of photographs I take – I usually shoot around 1000 shots per wedding. This increases the chance of getting great pictures.
I can change the light sensitivity, colours, etc. in the blink of an eye. This gives me absolute freedom to read the situation and adapt. I don’t have to stop and change film every time I want to swap from colour to black and white, or every time the light conditions change (e.g. walking out of a dark church into the blazing sun). It also means that I never miss a shot, since I can shoot hundreds of photos one after the other before needing to change memory cards.
I can immediately check that the image came out well.
The quality is just the same as film (and, I have to say, in some cases much better).
It allows me to work on the pictures afterwards, so I can take away that untimely spot, add subtle colour effects, etc – perfecting them just as if they were to be published in glossy magazines. This gives me an edge over traditional film photography, as the only way to touch up photos shot from film is to scan each image first, which results in a loss of quality.
With digital, there are very few ways you can loose the images. With film, that list is endless: a bad batch of film, the film doesn’t load, the film gets fogged, the lab messes up development, the film gets scratched or dusty… I just find using film much too risky for such a special day, and since I am responsible, it’s my job to minimise such risks.