I can't stand it anymore .... I've never heard of any failures, it's not in the manual, it's common sense that if you have no lube and rusty splines you put grease on it!
Why would you either wipe off spline grease just to reapply or add more just because?
No one I know crosses streams or rides in desert sand .....
and if I can get 15k+ miles from a car tire, I'm not planning to pull the rear wheel to spread grease just 'cause ya said so.
8,000 miles is made up BS and Chuck is right on the money.