They have been collecting data since 2014, with some car manufacturers as early as 2010. Also, average age of vehicle isn’t a good metric when a lot of vehicles in the US are registered but never driven.
The statistics I linked were Average Age of Automobiles and Trucks in Operation in the United States. The title said in operation not registered. The sources suggested market research not registration records.
How many vehicles are registered but never driven? According to what source?
The statistics said the average age of light vehicles was 12.8 years. The average age of passenger cars was 14.5 years. And Consumer Reports said 32 of 44 brands offered some form of wireless data connection in 2018.[1] This implied 12 brands or more offered vehicles without wireless data connections.