Yes, saws need sharpening. But there isn’t really a cool way of doing it: you just have to sharpen one tooth at a time with a file, dremel, stone, or whatever. A human can get in a rhythm and fly through the process, or you can build a jig or machine to advance the teeth and grind them, but it’s still a repetitive process.
Some saws have disposable blades of course, but that’s cheating.
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