It is impossible to have a profit margin of greater than 100%. What the author likely means is the markup - the difference between cost and sell price. For example, if it costs you $40 and you sell it for $100 that's a 150% markup but only 60% profit margin (simplistically). Electronics devices such as TV's have very low margins - sometimes 1%-2% but that is not the margin on electronic parts inside. Most importantly in electronics is unit volumes. A car model might sell 100K units, whereas one might make 50 million TVs of a particular model. So the higher volume is much more attractive to the electronic components manufacturer. But more importantly, that TV is a throw away item after a few short years. No need to keep many electronics parts around. However a car should be different, but we are seeing it is not. The dilemma is that as those electronics manufacturing lines go to higher densities, they no longer make the old parts. And the parts they do make aren't military spec - they are consumer spec designed to last for only a few years. So if your auto manufacturer didn't buy electronic spare parts to sell for the long term, you are out of luck if, for example, your body control module fails in year ten. Your car is inoperable and ready for the scrap heap even if it only has 30,000 miles on it, unless you can find a used part in a salvage yard ( if any of those still work). The problem is made more acute by the use of specialized integrated circuits, where there is little or no other market for the same devices outside of autos. This is by far the most compelling reason that we may not see cars from the late 1990's or 2000's on the classic scene in the long term. As their electronics age out, they simply won't run any more without the availability of replacement electronics. The problem is already happening with models of some of the lower volume cars of this time period. I haven't seen any creative aftermarket solution, likely because the parts are so specialized. If autos used generic processors there would be a chance of an aftermarket answer, but with these specialized silicon integrated circuits, there is far less a chance of a solution.
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