* Not all work needs highly experienced workers. Even the smartest coder in the room is typing one character at a time. * Everyone is more motivated and effect

* Not all work needs highly experienced workers. Even the smartest coder in the room is typing one character at a time. * Everyone is more motivated and effective when they are being challenged and occupied by their work. * Mentorship and knowledge-sharing benefits both the receiver and the teacher. * Over the medium term, junior engineers are less likely to leave.