Also, it might not even work! What happens when one of your fungible junior engineers happens to be smart enough to do some tricky things even with Rails? And

Also, it might not even work! What happens when one of your fungible junior engineers happens to be smart enough to do some tricky things even with Rails? And then she gets hired by Netflix to do something more career-enhancing than copy-pasting Ruby code from StackOverflow. Now you're stuck with your revolving door of undercompensated junior developers and a complicated Rails application. Uh-oh!