This is about minimizing litigation risk, from the manufacturer side and the parent side. The manufacturers want to limit their exposure to any one design. If

This is about minimizing litigation risk, from the manufacturer side and the parent side. The manufacturers want to limit their exposure to any one design. If this year's cost-saving design unexpectedly doesn't work, they want to budget and cut off liability. And, as a parent, if the seat is poorly designed in a way that it ever harms my child, I want to be able to sue the manufacturer.