Are there any disadvantages of vented soffit panels (made by siding manufacturers) as intake vents?

A. The primary disadvantage of the vented soffit panels is that they do not provide much net free area. The average net free area of a perforated panel is around 6 square inches per square foot.

That would mean that a 1½ foot overhang with fully perforated panels the full run (not every third panel or one every 6 feet, but completely perforated) would be required to balance an ridge vent that provides 18 square inches of net free area per linear foot. More.

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