If they failed to win it when they had Messi, Neymar and Mbappé, then I don't think they can do it this season. I even have doubts if they can reach the Semi Finals. Mbappé alone is not going to help them. I saw how thy played in the Group stages and although their group was labelled as group of death, 2 draw and 2 losses far low for a team looking to challenge all the way to the finals
Agree with you. PSG best era was when they had trio strikers Messi-Neymar-Mbappe. If in that era they couldn't win the trophy, it is more impossible to win it in the current era. We don't forget that they are very difficult to qualify to knock-out round this season. They were almost eliminated in group stage by AC Milan because they have the same total points. How they can win UCL trophy if they were difficult to qualify to the current round? Sure, it seems hard to achieve the semi-final round. Let's hope PSG can win against Real Sociedad first before predicting PSG to be the champion. It Real Sociedad defeats them, there is no way to win UCL trophy for PSG.
And the other thing about PSG in the group stage is that they couldn't even beat Newcastle who were in poor form at the time. And actually lost 1 time to Newcastle with a big score of 4-1. So I personally only predict PSG will only be able to reach the quarter-finals after beating Real Sociedad. And after that they will probably struggle in the Quarter-finals and will probably fail to get to the semi-finals. Because the opponents to be faced in the Quarter-finals will definitely be very heavy for them at this time. For Mbappe who might be leaving PSG would definitely want to make a good impression at the club and he will definitely fight better in his last season with PSG but the problem is having Mbappe alone is not enough for PSG if they want to go further in the UCL. And well I can't include PSG in the favourites for the title either. Unless there is a surprise like last season when Inter Milan reached the Final and everyone didn't expect it to happen.
There are a lot of probabilities in your post!
But you seem to forget that it all depends on the draws for the quarterfinals round. If PSG were to play against Real Madrid or Manchester City, I think that would be the end of their Champions League story for this season. But if they advance to the next round and then play against Dortmund or Eindhoven, I think PSG still has a chance to advance to the semifinals. There is Napoli vs. Barcelona, both teams are not that strong either and I think PSG would have a chance against them.
So after all we got to wait what the next round would be looking like, but I agree that against most of the possible opponents PSG would
probably be in trouble.