Well, aside from the cost of screws versus nails, I don't think screws would be considered for framing given screws have lower tensile and sheer properties.
AFTER I purchased my 21-degree framing nailer, I started looking at the prices of buying a box of nails. Yikes! They are expensive. But then I considered that a box of quality screws of that size and quantity would cost lots more.
I love it when I get a pallet put together with quality screws. The screws are easy to take out and reuse in other projects. I've had a few pallets made with screws, but maybe only 1 in 50 or more pallets. But they are a great find. I have buckets full of pallet wood nails saved up for something. Obviously, the individual nails are no good for a nailer, but I hope to use them someday, in some project. Also, with my Air Locker AP700 pneumatic nail puncher, I have been able to straighten out and save more nails then before when I was using the manual hammer and crowbars.
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One of the unexpected advantages I discovered using the Air Locker AP700 was that you can straighten out bent nails using the Air Locker's long metal nose before you punch the nails out. That resulted in me harvesting about 2X-3X more nails ready to reuse. I don't even have to strighten out most of those nails punched out with the Air Locker. That would be a big time and labor saver - if I actually reused those nails. Well, I hope to reuse those nails in some projects.
As a kid, I made many projects with my Great Depression era grandfather. We reused just about every nail possible. Back in the day, you didn't go into town to buy a bag of new nails unless you absolutely had no old nails left in the bucket. So, I find it hard to get rid of my used pallet nails that I know are more than adequate to be reused.
in my small pallet projects I use screws only. the reason is I somehow always make changes so screws work better for me. but I still save nails out of habit. my grandfather as well reused nails.