I'm not long on Uber either, for several reasons. But there exists a possibility that Uber's legacy could be that it served an important and pioneering role in the evolution of transportation and that is something that current employees should consider before they want to jump ship due to perceived brand popularity.
I agree, Travis did indeed disrupt the taxi industry and had to fight tooth and nail to get Uber to where it is today. I respect the hell out of that but unless Uber has enough money saved up to buy a small car manufacturer they are toast in the long term.
Regarding brand popularity, there's a quote from Gladiator that I love: "The mob is fickle brother". We're living in an age of the mobile phone app and there's no such thing as brand loyalty anymore. We as consumers and contractors can UNinstall an app such as Uber or SnapChat in 5 seconds. The only thing preventing that with Uber is likely the same thing that keeps Walmart in business: $$$.