The problem is market maturity. If Uber is currently facing a quickly maturing market, the upside is limited. Investing in growth is much different than investing in diversification. For example, Google's ad-click market is completely mature, there is very little new growth there. So all their investments are in something new to add to their revenue pipeline, whether that will be AR or autonomous technologies. The fact that Uber is already seeing a loss of market share indicates that market maturity is fast approaching. How much of their investment is simply protectionism to maintain market share rather than growth?