Your analogy is nothing like what Apple is doing. A more apt analogy would be selling trucks that don't have easily upgradeable engines where you wouldn't be ab

Your analogy is nothing like what Apple is doing. A more apt analogy would be selling trucks that don't have easily upgradeable engines where you wouldn't be able to access the engine components without a ton of work, which is exactly how they build most trucks nowadays. The sealed bedcover is more like a limitation in software since that's part of the functionality of the truck. Upgrading a Mac isn't part of the functionality, it's something you do to increase the speed at which you work on it. And as for the body-on-frame comparison, I don't really know what you mean there. If you are talking about the actual, physical chassis of the MacPro not being on a conventional computer frame, then again, that is a bad analogy since a body-on-frame chassis on a truck directly affects the towing and load capability of a truck, which is not so with computers. You can have your components scattered across the floor and they would perform just as well as in a conventional chassis.