I Said for many years don't trade Smart. I wanted to see how good he was going to be when he peaked. I'm fairly confident we did see him peak. For sure defensively.
And his confidence on offense was just to high for his skillset, taking away shots from Tatum and Brown in crunch time is a deal breaker for me.
To quote Ainge on Antoine Walker, "He had too much of a hold on the franchise " that's essentially how I felt about Marcus.