The problem is that I can't use the 'nice' app in every city I visit that has Uber. It's the aggressive growth and VC that allows it to be everywhere. And at least where I travel, the existing taxi corporations are far worse than Uber. So yes, in an ideal world, I'd rather use open-source app to hail my sustainable eco taxi, but such an app does not have the funding to upend the existing taxi rackets.