Otherwise, after players like Messi, Neymar and Mbappe Ramos leave Ligue 1, spectators will not be found in Ligue 1 matches.
I think it's a bit redundant to make such a judgment, but maybe that's just your opinion. Ligue 1 is one of the league in Europe today where all the team there have very fanatical supporters of their favorite team. Without star players like Messi, Neymar and Mbappe then I think they will still get a lot of viewers around the world for one reason that this generation of players will be replaced by the next generation in the years to come.
-snip-
I really don't know of any plausible reason to see PSG fail at the end of the season with a super-luxury squad like it is today. In certain situations, I think PSG players are not experienced enough in the Champions League so they always fail to win titles. But this season is a bit different and it's probably because of Ramos, Messi and other players who can be a supporting factor for them to advance to the next round.
Real Madrid is a the strong one opponent for PSG this season in the Champions League. Proving which one is best will take place in February, so speculation these two team now probably won't do much good considering it's still too far from show day.