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Paper is a system that would have worked 30 years ago, unchanged to today. I think there's a reasonable chance that the same system would be working, unchanged, 30 years from now.

How many computer-based systems from 30 years ago are working unchanged to today?

Also, it's a system that any member of my family at any time in the past half-century from ages 12 to 98 could have understood. I think there's a reasonable chance that the same technology (paper & boxes) will be understandable for the next half-century, as well.

If you want to be updating a computer-based system for something as important as this every 5 years, that's fine. Everyone needs a hobby. But I have no guarantee that my family will be interested in or comfortable with it when it is needed.