Trucks, aeroplanes, boats, pretty much everything with an engine except cars have their service intervals and repairs set at an amount of hours, not km.
Friend bought a Mazda 626 many years ago. Had 11,000km on it. The car had never been driven from one side of the town to the other. He bought it, and it lasted about another 150km. Its first ever long drive.
The engine had never got warm, rings never bedded it.
Pulled the motor down and it was shot.
Put a 2nd hand motor in it and it was great. Until the suspension collapsed not longafter. All the rubbers had dried up.
Replaced bits and pieces from the wreck he bought. That car has not missed a beat since. God only knows how many km on the 2nd hand motor.
To say an engine is a ticking time bomb just because it has high km on it is really not fair.
It all depends how its been driven and looked after.
Plenty of MPS motors have had serious problems with less than 50,000km on it. So having done 200,000+ can only say that its been looked after
2013 Ford Focus ST - Performance Blue, Cobb AP
Gone 2006 3 MPS Sports - True Red, Koni FSD shocks, in dash OEM look Ebay GPS/DVD, Hypertech, RX8 Rims