Hm, I think 'one big marketplace' is how people originally thought about messaging online. I don't need WhatsApp, I have SMS. I don't need Snapchat I have Whats

Hm, I think 'one big marketplace' is how people originally thought about messaging online. I don't need WhatsApp, I have SMS. I don't need Snapchat I have WhatsApp. I don't need Facebook, I have Twitter.' However, horizontal differentiation in messaging and social has allowed people to use different tools depending on context. In fact, it's currently a bit silly to think you'd spam all your message or social apps at once using a single app or service. I don't really feel there is a natural monopoly with today's tech when it comes to carsharing. This goes back to my first couple of points where ultimate coordination and reduction of friction may be better served by local/human players to some extent.