Big truck manufacturers have been making aluminum cabs for years. Most of the trucks you see going down the road these days are a mixture of steel, aluminum, fiberglass, and plastic as well as unknown materials derived from reverse engineered alien spacecraft. Overall I think they do an OK job of putting it all together but you do run into the occasional water leaks and electrical problems. To be fair who knows what causes the electrical issues, modern trucks probably have far more electronics on them than today’s cars.
If a new aluminum Ford should be turned into a “carbecue” the only thing left will be the engine and frame. The body will be consumed. Gone!