Not the poster you're replying to, but there are more parallels, IMO.
A lamp, you throw out when it breaks, normally.
A car, when it breaks, you fix the part that broke, which is generally just one part or a small assembly, not, say, the entire unibody if the fuel tank springs a leak.
And, while this is very uncommon in cars and rather common in computers, you may decide you want a more powerful engine, one that was offered in another version of the same model. In this case, you could find a wrecked parts car, buy it, and swap the engine over. In the iCar, you wouldn't be able to do this practically, as it's welded to the chassis and transmission, and the axle shafts are welded to the transmission and wheel hubs.
Yes, I know, the analogy's flawed - I know people who could do that to this theoretical iCar (and actually do even more complex projects regarding putting engines in cars that they don't belong in), and it's easier to cut something that's welded out and weld something back in than to do BGA rework on a motherboard.) And, there's always forced induction, too. But, the skills to do any of that are more specialized than the normal mechanic skills required to pull off a "normal" engine swap, just like the skills to do BGA rework are far more specialized than the normal computer repair skills.
