But those are different classes of bets, no? I mean, Tesla makes cars, and a self-driving car is still a car. Google's primary business has nothing to do with cars. Their "X" bets are in completely orthogonal fields from their primary business. They are (in theory, anyway) hedges against a complete collapse of that primary business, while Tesla's is more evolving their primary business to position it for the future.

Which is not to say that Tesla is Doing It Wrong -- I personally am a much bigger fan of focused, iterative improvement than of wasteful throw-spaghetti-at-the-wall "moon shots." It just feels unfair to compare the two.