Most mechanical components follow a so-called “wear out curve” or “bathtub curve”, where after a long period of low probability of failure the chance of failure rises rapidly. With good Japanese cars that rate of increase would be at about 200,000 to 250,000 miles. With a Fiat or similar low quality cars, the curve starts to go up at 100,000 miles or so.
This assumes proper maintenance according to plan…
So, if you buy a good Japanese car with 200,000 miles on it there will be some repairs in the near future, maybe not the main engine, but other components have a higher probability of failure.
On a Nissan we owned, the CV joints and axles, alternator, starter, all went before 200,000 miles.The steering rack started to go just before we sold it.
Years ago with US cars, at 100,000 miles the starter, alternator, a battery, U joints and other components were expected to fail.