A car (especially ICE but even EVs) consists of tens of thousands of components. People like to point at things in cars and say "why did they save five cents there? And 10 cents here?", and the simple reason is if you bump all these components up one "quality level", if you will, that's thousands of bucks just in material costs. The twenty dollars of per-car savings are not profit, they're unit cost savings, which will contribute to profit, but also price. And margins in the car industry are rather tight, buyers are cost sensitive, it's not an industry where you save 10$ on parts and are able to pocket that, I don't think.