trouble is now most mechanics like to just change the engine as it's much easier to do than an overhaul. overhauling does have it's advantages. a properly overhauled engine will last a lot longer than an engine bought at a half cut shop. my own engine is a prime example. i blew the engine at about 45k km due to being too greedy for power during r & d. one con rod was bent, slight damage to the crank & cylinders. i overhauled the engine and now it's still going fine. current mileage at 203+++km.
the art of properly overhauling an engine is going the way of the dodo bird as most mechanics now are too lazy to do an overhaul. with all forms of art, if u don't use it, u lose it.