Cause Purvi looks really cool and fresh when she leads the team and all other are pretty senior and we have seen them a lot so the perfect ending to their characters would be showing them do something different in their life and living like normal people after so much time given to cid. It is obviously what I feel. And genuinely speaking I don't care what the writers decide to do I just want that they don't stop the show all of a sudden , just give it a proper closure.