I watched the videos and the only advantage I see is scooping up dirt/crushed rock which is good for construction purposes, all other functions could be done with a grapple or thumb on a bucket and then if one made some sort of add on to grapple, that could scoop up dirt also. If I had 40hp tractor, I'd go grapple and modify for dirt. I'm quite certain that a 4 in 1 bucket is to heavy for my tractor, with my bucket full of dirt the lift is maxed out, I'd rather lift a bucket full of dirt/heavy log then a heavy bucket.