The Boston Celtics had all offseason to trade Payton Pritchard if they were going to do it, and nothing has come to fruition. I think that says a lot about where they view him in this team's core going forward.
It wasn't like Pritchard didn't get moved because he didn't have any trade value. He has done more than enough while playing on a contending team to impress other front offices around the association and make them interested in acquiring him.
And sure, there's technically another week and a half before media day and a trade could still be made.