Costs I think is the main reason. Higher trim level, more expensive "luxury" 80 series models came with the full time cases, costs more for toyota, will cost more for us.
Meantime the 70 series was and still is a work truck, so the cheaper simplier part time box fits it well.
Meantime the 70 series was and still is a work truck, so the cheaper simplier part time box fits it well.