Depends on your confidence in your skill and possibly your fitness. Back in the day, rugged adventurers conquered the world in series land rovers with just a centre diff lock, no traction control, no nothing, they also did a lot of physical work, track building and digging and hauling etc, and those vehicles were also much lighter. But vehicle’s have gotten much heavier and fatter, like many of us (speaking mostly of myself here) advanced traction control systems do a lot to compensate without diff locks, my Discovery 3 went crazy places and I didn’t have the optional rear locker, but it’s multi program electronic systems and adjustable height air suspension was pretty incredible. The Grenadier is very heavy, it has traction control but it is on the surface fairly basic single mode, we don’t have a huge amount of experience with it, the clearance height is also not bad for a stock vehicle but it isn’t massive. The beam axles and articulation is a plus and will make up for some of that. And we have all gotten soft (I’m sure there are exceptions) but most of us are very unused to toiling away with a shovel in the dusty bush wearing only a pair of shorts, boots and a shirt wrapped around our heads in 40° C. So I suspect there may be times when when we would trade our left nuts for a diff locker when hours from civilisation and face with a rutted muddy section of track up a steep hill between us and a cold beer. Of course if you are just doing school drop offs and the ocassional gravel road and a run up the beach once a year on Summer school holidays you will probably be fine without one.
