Basswood: does not really not work for acoustics because it’s not very acoustic, but rather, mostly dead. Korina is cool, especially for electrics. It’s a mahogany substitute from Africa, also known as limba, but there’s not a viable supply. Acoustics like harder wood than korina. Sapele is better pound for pound. Ash? It would make a good acoustic, and so would oak. But it’s not the look people are accustomed to. In the end, we’ve distilled our tastes down to the woods that have the right availability, the right size tree, the right weight and density, and the right look and sound. Oh yeah, sound! Sound is very important, and many woods do sound great. But if they look wrong they never get picked up and tried. It’s quite a little matrix. So, that’s the story. It’s not that they can’t, but that they're in competition with other species and lose.