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You got it backwards. The notch was for compatibility with the extension cable, which had a lug because USB extension cables are not allowed by the spec (too mu
by lonelappde 7y ago
You got it backwards. The notch was for compatibility with the extension cable, which had a lug because USB extension cables are not allowed by the spec (too much distance for the signal), so the lug prevented you from using the extension cable with a device that might fail.