> The average car is 12 years old.

That's not the same statistic though: If the only car in the world was manufactured 20 years ago and had 4 owners, then the average ownership-duration would be 5 years, a much smaller number.

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Survey says [0] people tend to cycle vehicles in 8 years.

[0] https://www.thezebra.com/resources/driving/average-length-of...