That is exactly why history has very few recorded events of LX/LC timing belts ever actually snapping. Just one of those semi-overrated OCD maintenance items.
That belt probably has a whole lotta life left in it. Those small cracks on the back side seem to be fairly common. It's the water pump death rattle you should pay more attention to. The life span of the belt is not an issue based on years and years of data from MUD threads.