Len wrote:

The main benefit of these saws is they cut on the pull stroke,
keeping the blade under tension during the cut. This minimizes
binding, and makes it very easy to maintain a straight cut
compared to a typical push type rip saw. They also cut much
faster, even in relatively thick wood.

Actually, for the same amount of wood removal, they don't cut any faster at
all. But, because they cut on the pull stroke, the blade is much thinner and
only removes about half as much wood for a given length of cut.

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It's turtles, all the way down