KAL at least hasn't left a blue bill board stuck in a hillside for quite a while, although not through the lack of trying.
As I recall the last one was a 747C rollover into the dirt after
TO Stansted. Capt A/H failed and the FO just let his boss kill
him. This wasnt long after Guam I think.
Its a while since then and yep there well overdue for a fatal
prang.