Let's not lose sight of the fact that pen and paper, as old technology, still offers the best flexibility possible because clients can write notes or comments in the margins and between lines to better explain items which have nuances that "yes" or "no" answers cannot capture.  

I have been running a no-interview practice for 20+ years, and find that my clients use the pen and paper to augment the questionnaire, give perspective and offer incidental information that is usually helpful

If we digitize the questionnaire portion, my warning is to include plenty of unrestricted text fields where clients can annotate the organizer with their thoughts, not just a blank page at the end of the organizer.  

Sometimes email just doesn't cut it.  You have to pick up the phone and actually talk to someone.  The same is applicable to electronic organizers.  Sometimes the old tech just works better.  So, when converting the paper organizer to digital, let's keep in mind we're trying to replicate the pen and paper, not abridge it's usefulness by digital shortcuts.  That is, your practice is anything other than a tax mill or humanized version of Turbotax.