I would be interested to know the cause of these fires, and the theories mentioned are indeed very plauseable.
But do not think for one minute that these are well constructed cars. Sure, the engines are good, the bodyshells are pretty and the interior trim is crafted to the highest standard - but it ends there, the rest of them are virtually held together with nails and gaffer tape. Carpets are pop riveted in, and many panels are so paper thin that if removed they lose their shape completely making reassembly very troublesome.
If you think about the designs that have progressed down from F1, the people that make these cars are used to stripping down a car after every race, and think that an endurance is only 24 hours. They simply do not know how to make a car that will last for more than a few weeks without breaking down. From my own experience, this is not just Ferrari and Lamborghini, but just about every exotica marque that is currently available today, and I am left wondering if anybody now makes a "supercar" that is reliable enough to last - and if you can think of one, please let me know.