Internal combustion engines are very complex. Yet they can be produced really cheap. It's a bit like microchips. Vast sums (think tens to hundreds of billions

Internal combustion engines are very complex. Yet they can be produced really cheap. It's a bit like microchips. Vast sums (think tens to hundreds of billions) have been invested into the "machine that makes the machine". Cranking out engines at this point is relatively simple. Path dependency is a very powerful force.