My VW golf is coming due for it's 215000km service soon. Only things that died are water pump ( so common) twice, one front bearing, rear bearings, fan heater resistor ( I used a later model one and modified it to fit, otherwise $100 from agents), head gasket ( also common, but I got it quick so did not have a head break into 3 pieces) and the AC is also in need of a new compressor and a new drier ( Waiting for enough money to buy the parts to do it), but so far it is working out a lot cheaper to run than new car payments. It will soon be a teenager.
As to flying cars you will never have them as a vehicle for the masses, it just will not work, as you cannot control them accurately enough with any current ATC, or you will have a rain of falling cars in every city every day. Now, if you get automated vehicles to the point where you can get in and go from any place to any place without intervention, you can have a similar system for flying cars. It however will be limited in both places and in conditions, like current flights, so you would be better off with automated roads and cars to go on them connecting places, and have airlines like current systems for the long haul. You cannot have a SUV like aircraft that is both a good aircraft, and a good road vehicle. You compromise greatly on all sides.