I think it would be pretty rare to find a paper "storage or processing " device that can accommodate letter but not A4.
Rare? A simple shipping cardboard box is sized to fit either A4 or letter sized piles of paper. Simple enough to change, but fairly common.
alt Hacker News
Rare? A simple shipping cardboard box is sized to fit either A4 or letter sized piles of paper. Simple enough to change, but fairly common.