I said that before I think the main reason for PSG to have bad performances in the Champions League and the reason of why they usually fail to win the title of the Champions League is the league they are playing in it. PSG is playing in the French league and in this league, there are not many strong teams or there are not many teams they invest too much money too much money like PSG while PSG is far from the other teams and they won't have competitors to race with them.
However, they focus on the Champions League to have better performance but this is not enough and they won't have good competitors to race with them and Al Khelaifi's money won't solve this problem in PSG.
That seems to be changing just a bit this season, but we do not know if that will be a long term thing or just for this season. Monaco and Marseille is doing fine in the league, and at UCL we are seeing Brest doing fine as well which was definitely not expected at all and a shock to everyone.
So, if French teams keep doing this good both in league and also in UCL as well, that means their league is growing and the yare going to do better, and they should be gaining some advantage thanks to this as well. PSG facing harder competition on league means they are going to be getting better and not really give up that easily, they know they will win at least the league so they are feeling more comfortable with their games right now, but if they face tougher opponents in the domestic league then they are going to feel better.
UCL on the other hand means more money, if French teams end up playing better and even go further into next stages that would mean a lot more money and a lot more money equals to more and better players as well. So when they do get good results, and get better players, that would make their team better, so that would in return become tougher opponents for PSG as well.