"Aw those old plans, sketches, blueprints from a time when everything was better!"
Was that time really better? When architects, civil engineers, electricians, mechanical engineers drew all their plans by hand. All those plans were archived in boxes in the basement. When entire plan books with the project and plan numbers were written by hand.
This time is gone, the new time is not better or worse, it is only the future! The knowledge in these plans must not be lost!
That is why there is a possibility to digitize such plans.