Everything ive read about Cena agrees he truly lives for the industry. It all comes down to health imo as i dont think he will keep going if he ends up in a situation like Edge but otherwise i could see him performing in the ring for as long as he is able to pick people up and FU them.

Punk doesnt seem the type of wrestler to keep working in the ring long after his time. I see his commitment something similar to HBK where he knows when he gets up in age he will put over the younger guys and then have a retirement match at WM and retire from in the ring so he doesnt stomp all over his legacy and im sure if Punk wants to commentate after he retires from the ring the door will be open for him to do so.