How many people do you know with 20 year old 2000-2017 cars?
Most used cars I've looked at in dealerships (as opposed to the Craigslist/Uncle Henry's as-is-where-is private sales) were overwhelmingly former lease vehicles.
It replaced a car that had 190k miles from around 2000. Its worst problems were a bad A/C compressor (replaced at ~100k miles) and a slipping clutch (it was the original clutch). The plugs and wires were replaced once during its service.
Modern cars are amazingly reliable and amazingly safe compared to their predecessors.