Thank you for the reply! I appreciate the philosophy of hiring generally good people and letting them learn new stacks as needed. However, there's also something to be said for specialization. For example, I work in scientific computing and have never touched Rails. Even though I might be able to learn what you do, I think we'd both probably agree I'm not the right person for it -- so even just those few extra bits of info about Rails make it so much more efficient for both of us.