Self-driving cars would be really cool but it seems like a long way to reach when you could invest that money in public transport and rail. Its not as convenie

Self-driving cars would be really cool but it seems like a long way to reach when you could invest that money in public transport and rail. Its not as convenient or sexy but I bet you'd get actual results: people able to... go places without having to drive. Maybe not directly from their door but thats kind of already a solved problem, too. At the risk of perhaps sounding like the "why Dropbox when we have FTP" guy, are SDCs necessary enough to throw this much money at?