What Toyota does isn't rocket science, they use the same engines, platforms and components for YEARS and iron out any deficiencies. Time for a new model? Just re-skin the old one and keep everything the same under the skin. Lexus? Just re-skinned Toyotas.

Remember when Dodge quality went to #1 or something a few years back? It was because they dropped everything except the old charger/challenger and durango! Now watch it plummet again with the new hornet that has little 1.3L turbo engines and PHEV battery tech.