Aiyo same goes to new car la.
My friend one year car already have unstable idle rpm which until now toyota SC says it normal because they can't solve it, weird squeaky sound here and there which took a few trips to the SC to solve.
I also have one friend new 1 week old car broke down while driving and need to tow away.
Sure new cars are less likely to break down, but it is more to the owner's issue. if you properly maintained and inspect your car, it will be as reliable as a new car. Furthermore old car's has less electronics which are more likely to fail.

In short, since I knows about car maintenance and did not skip those important ones, I can say the big advantages newer car has are SAFETY during collision and Second is fuel consumption.