Since they are in a team that won the UCL this year, their departure to another team would only be valid for players who have less playing time at PSG. Otherwise, it would not make sense for a player who is in the main squad of Paris Saint-Germain and plays constantly to go to another team. Because Paris Saint-Germain is now a team that is the Champions League champion. They have achieved the medal that every footballer dreams of and they will fight for it next year.
Reserve players who do not have more playing time are quite reasonable to move to another team with quite logical reasons. But if PSG's reserve players are not good enough for next season, I think PSG will have a hard time fighting again in the Champions League because it is a quite difficult League for every team that enters there. So PSG also have to think wisely enough in releasing existing players because the current PSG squad is a squad that is already quite good and that has been proven by getting a treble winner this season.