Sure they have, didnt stop Luke from moving and changing teams. Now there is pressure to fit in, become part of a team.
Like changing jobs, may have had great friends there for years. Then people move on, location, new job (with a competitor) and new loyalties are expected. Not towards the old . It's human nature. Pressure , a conscious and subconscious mentality. Every day like will be trying to further his career training with these guys and they will expect something in return. Only the very best of us, most loyal will remain loyal to the or roots. Most will not. It's been proven over and over again.
Luke imo has nevef had the loyalty if Cain and DC. Out of the three he's the first to move and would be the first to fold.