I and probably most people I deal with have smart phones, etc., and yet I still find a need to be jotting down something quick.
And the situation is quite different when I am looking to do business with a non-tech person. Things are not always so ubiquitous in different groups of people, "modern age" not withstanding.
And even if you could get the same results using a device, there are business/social reasons to hand someone a note written on your business card.
Some inefficiencies have value. Don't be blind to them.
