Still being used around here. It is definitely a "bucking" saw. It saves your back because you can stand and use it. It doesn't pinch like a bar because the bow's perimeter is so thin that the log closes after the chain has already been through. It doesn't matter that it closes in the center of the bow because you can yank the bow back out after the log is cut or put a wedge behind it if you have to. 'Course that's never done.
It is not a tool for cutting down or brushing though many folks will use it for that. A big bow will take a tree down if you know what you are doing. Brushing will get you in a lot of trouble. It limbs pretty good too.
I think that the insurance companies are the culprits for making them harder to find, the Gov. always picks up on anything they can "stop" you from doing. They don't want you using a chainsaw at all and bows caused a lot of injuries. They don't consider that the pulpwood industry down here only used bows. Bars were few and far between. I guess that makes the ratio of injuries skewed.
It's a good tool if you're careful.
Eddy has a bar on another little saw but it is only used to trim on the truck if he has to reach or climb. The bow is his tool and it's the first thing he picks up.
I posted on this on the stihl 011 thread on this same forum awhile back. Here is what I said then.
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With a bow, you cut with the tip. That's a no-no with bars unless you are plunge cutting, but with a bow it is the only way to do it. The claw is located at the bottom of the tip and rides the log so that the chain has something to pull against.
The sawyer rests the weight of the saw on the prostrate log and balances the sawhead on the the end of the bow. In short order the chain has cut through the log and the opening in the bow has kept the closing kerf from binding the saw.
Bows must be matched to the size of the tree as well as the size of the saw. They are more in their element bucking downed smaller trees in the 20" or less class. They are not intended for felling, though some sawyers use them. They are definitely not to be used for brushing.
When using a chainsaw for firewood and pulpwood production, the bow reigns supreme.
*note: The government safety squads don't like them.