Only the first 30 seconds of the video are important: https://youtu.be/cL3nWqvzfow?si=fz6wc48MFo36Bbbg
Literally there are *no* other purposes for blade technology, even
today. On the other hand, this particular job *demands* blades, because
you cannot cut one by one stem, the only senseful thing to do is to cut
them in a sheaf. And blade technology is ancient, I believe that they
have evidence 700ky - 800ky old.

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