Yes, crash landing into people, building, trees, and other traffic is a concern. But automation is not enough, we also need standardization and synchronization,

Yes, crash landing into people, building, trees, and other traffic is a concern. But automation is not enough, we also need standardization and synchronization, because I am not looking forward to a future where the whole sky above a city is filled with random flying objects everywhere. That would be a mess, particularly around/over low-rise buildings, such as in villages, suburbs, and similar neighborhoods. Flying everywhere you want to go might make sense in either densely populated high-rise cities where you could fly and park your car at height, freeing the ground floors for pedestrians, cyclists, nature, recreation, and so on, or for sparse populated areas where there is no-one to be bothered anyway.