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Easy solution to that problem, Don't cut all the way through the cutting board and you'll be fine.
Seriously, I could make a youtube video that shows a knife edge rolling and chipping while trying to cut through wood sticks, does that mean that a wood cutting board is hard on knifes? No, it has absolutely zero bearing on the knife edge. Abusing a knife to "demonstrate" bamboo (or wood) is hard on a knife edge is just that, knife abuse.
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Bamboo is hard on knife edges, there are YouTube video of blade edges rolling and chipping just from cutting disposable bamboo chopsticks.
Easy solution to that problem, Don't cut all the way through the cutting board and you'll be fine.
Seriously, I could make a youtube video that shows a knife edge rolling and chipping while trying to cut through wood sticks, does that mean that a wood cutting board is hard on knifes? No, it has absolutely zero bearing on the knife edge. Abusing a knife to "demonstrate" bamboo (or wood) is hard on a knife edge is just that, knife abuse.
You should make a YouTube video where you cut through an onion 500 times on a bamboo cutting board and repeat the test with an end grain cutting board board, then post microscopic images of the edges to see if the cutting board surface made a significant difference in edge retention. That would actually be useful, as opposed to what you said.
Bamboo is hard and dense, bamboo cutting boards also have a great deal of adhesive because the individual pieces are so small. Both factors contribute to dulling. I can run a piece of plywood over my jointer on edge and actually see on the next piece of solid wood little grooves where the glue lines abraded the planer knives. This is noticeable enough that I will only joint plywood on a spiral cutterhead carbide insert type jointer (6") instead of my 16" jointer with old-fashioned knives. Hard wood (think Jatoba, Ipe, etc.) dulls jointer knives way faster than softer wood (maple, ash, walnut).
End grain maple, walnut, cherry are softer than bamboo with less adhesive...it stands to reason they would be a better choice for a cutting surface. This is why I choose not to cut on bamboo, or glass cutting boards, or the granite counter, or steel.