There are times when I need to chart out relationships within a family--without printing the entire tree or even the entire family group. I just need a few people. And sometimes doing that on a computer takes up too much time.
A pencil and paper gets the job done faster and I can get to actual research.
There are other times where actually just "scratching" things out on paper is faster.
Do you need a computer for every task? Is there something you could do on paper and pencil in five minutes that would take you 5 hours on the computer? Remember that you are not always creating layout for a magazine or publication. Sometimes you are just making a working chart for yourself and your own use.
And it saves time for research. And isn't that what it is about?