How soon will flying cars be available?

Can you tell me, how optimistic are experts about the timeline for the availability of flying cars? Are there any major technological hurdles that still need to be overcome before they become a reality? Are there any prototypes or pilot projects currently underway that could indicate a closer timeline? Additionally, what kind of regulations or safety standards would need to be in place before flying cars can be made widely available to the public? And finally, what are some of the potential benefits and drawbacks of flying cars, and how do they weigh against each other?