Or towing or driving in the mountains (long steep grades).....

95% when I'm off-road I'm not in 4-low. The QDII system is very predictable, normally I never even know it locked up even while going up climbs with the tires coming off the ground. It works so well its like being locked 100% of the time.

I only use 4-low for steep climbs that I want to take slow.... gear reduction for better throttle control and reduced drivetrain load.