I don't think it is inevitable at all. Possible, sure, but inevitable no way. Rozier has been given almost no time, it might be because he isn't very good and never will be. Or he could be a break out star. Only time will tell. Smart may be nothing more than a defensive role player playing 20 minutes a night. Or maybe he takes an offensive leap and becomes a real star. Again only time will tell. Maybe Boston decides it doesn't want to pay Thomas or Bradley and one of them gets moved. Or maybe it takes Thomas or Bradley to be a piece in a trade for a major star. Maybe someone gets hurt and is never the same. There are so many question marks that no one can say with certainty that someone needs to get traded. Now sure, if the offer is right, they will get traded, but that applies to every single player on the team. Ainge will trade anyone at any time if he thinks it makes the team better.