A lot of people in the world like the looks and sound of a regular
guitar. A portion of those people would like to have a guitar that won't be affected by temperature and humidity. A lot of those people are not looking to throw out the baby with the bath water (so to speak).
RainSong seems to be catering to those people. I have one now and like it a lot. Though it does midly irk me that they choose to have a 20" radius fingerboard instead of a 16" board like most every other acoustic guitar in the world.
But I'm easily irked.