So what you're asking is can someone come into the ToD and introduce a new product that steals people away? It's plausible and if I were in a better headspace I could probably name you a bunch of examples. But does it always happen? I don't think so. There are plenty of incumbents who manage to coast through and come out the other side having demonstrated a dilute form of change of heart - just enough to convince the customers that 'something was done' even if they can't quite put a finger on what exactly is better and how much.