May depend on how you "set Up", i.e. if you cover the piece with blue painters tape, and it sits for a long time, it can become very difficult to remove. I don't know how long that long time is. I do have some patterns mounted and waiting to be cut, and they have been waiting for some months,,,,, guess if I ever cut them I will know.
I routinely have two or three projects going at once, so I can switch around, but my "active" projects don't sit long. I am also using the shelf paper stuff now, I don't think it gets hard to remove like painter's tape can.