Depending on things, manufacturing your own cut nails in your backyard from free scrap metal may be more efficient and significantly easier than pulling nails. It doesn't help much if you want to reuse the lumber, though.

My dad bought exactly one pound of roofing nails when replacing an entire asphalt shingle roof thanks to child labor.

Did he at least buy new shingles?

They were unused and in the package and they were new to him. They weren't new to the world. And he didn't buy them he bartered for them.

oh, i had my share of that project too. way back then, i found busy work fun. i think it is the true source of my absolute frustration with busy work now. thanks doc, i think we just made a break through!