I've got longer bars on my older saws which I use to crosscut the larger downed salvage timber & I used to production fall with big saws 120cc+ and 30" - 36" bars and unless you're in consistently 1 meter + timber you can't get around as quick or as easily & cut as much, its subtropical here so the understory can be jungle like with vines & crap, then add the steepness & heat you're looking at having the most efficient system to lug around, I don't think you can even imagine how hard our timber is or how the fibrous bark that covers it effects the cutting, some old guys will still axe the bark off over any cuts they are going to make.
As a matter of fact we used to and maybe still do export hardwood timber to the US which they used in the bows of freighters on your Great Lakes, it was used to reinforce behind the steel hulls at the pointy end so the ships could break ice during winter.