I'm only starting to hear that Uber intends to replace public transportation: > Our Personal Mobility TAM consists of 11.9 trillion miles per year, representin

I'm only starting to hear that Uber intends to replace public transportation: > Our Personal Mobility TAM consists of 11.9 trillion miles per year, representing an estimated $5.7 trillion market opportunity in 175 countries. We include all passenger vehicle miles and all public transportation miles in all countries globally in our TAM, including those we have yet to enter, except for the 20 countries that we address through our ownership positions in our minority-owned affiliates, over which we have no operational control other than approval rights with respect to certain material corporate actions. We estimate that these 20 countries represent an additional estimated market opportunity of approximately $0.5 trillion. See "Our Market Opportunity" section in the S1 (https://www.sec.gov/Archives/edgar/data/1543151/000119312519103850/d647752ds1.htm#toc647752_4 https://www.sec.gov/Archives/edgar/data/1543151/000119312519...) This seems quite ... optimistic to me. I'm not sure how many public transportation companies actually operate at a significant profit, such that they can undercut. It also seems risky, in that they might generate a huge backlash if they try to do the whole "we're just gonna loss lead until we're dominant, then jack up the price" strategy. I'm guessing there is section of the population that says "screw it, I'll rent a car" where public transportation is quite slow, but replacing public transportation for poorer people is just going to be losing money. Given that Uber is already losing money, I'm just wondering how you'd develop a model where this TAM makes sense.