It might increase my resale value, if most buyers are like me (not commercial owners who always supercharge.) Which they are.

That's irrelevant, legally speaking.

Car companies can do plenty of things that hurt your resale value which are completely legal. They do it every time they lower the price, or bundle in more standard features. They do it every time they release the next model. They do it when hidden engineering short-cuts mean expensive repairs are necessary a few years after the warranty expires...