I always thought that hardness is most important in a fretboard, is bamboo hard enough for this? I have a Parker guitar with a glass composite fretboard (carbon glass they call it) and it’s the best part of the guitar for playability.
The bamboo boards I ordered had a higher density than ebony (1100 kg/m^3 for bamboo vs. 955 kg/m^3 for ebony) and according to the suppliers site, they are roughly the same Janka hardness. That's why I went for it.
I don’t know if hardness is the best criteria. I have both rosewood and ebony fretboards on my basses and they feel differently and longevity seems only loosely affected. I’m not slamming down hard on the wood like what happens in flooring though and maybe other players are much rougher than myself.
Keep in mind these aren’t what you would get if you cut down some bamboo and used them. They’re usually processed, compressed, and a high % by weight of glue or epoxy. Many of them are harder and tougher than all but a tiny percent of exotic hard woods.