When we got married we desperately wanted a wedding album and got quite a fancy one (for the time), even getting smaller copies for the family. How many times have I, or family members looked at those albums? Once, maybe twice. For me it's been a total waste of money, I only ever look at the images digitally. I think albums are just one of those things we're 'trained' to think we want/need but in reality don't. I think if you can find a way of tactfully portraying this to customers you'll be golden with digital only format, well maybe 99% digital with a print or two of their favourite image.