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

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.