Market cap isn't the same thing as revenue. Their annual car revenue is somewhere in the neighborhood of $100B a year, which still is the lion's share, but anyt

Market cap isn't the same thing as revenue. Their annual car revenue is somewhere in the neighborhood of $100B a year, which still is the lion's share, but anything that generates 5-10% of revenue isn't something to ignore, especially when you have a couple of those. Apple's Mac sales are only 15% of their iPhone revenues, for example.