Nobody can be an alternative for Messi and fill his position at PSG also there is the same story for Neymar, even if they had a bad performance recently still Neymar was a legend in PSG for weeks before he gets injured.
Also heard there are some other people who want to leave PSG this season and it seems the owner of PSG needs to find players and this is so hard when we are talking about players like Messi.
When talking about individual abilities and skills I agree but for now put that aside for PSG.
They are just trying to find the best regardless of age so that the hope of becoming an instant club is possible but in fact that slowly has to be changed.
Now in my opinion instead of them trying to be galacticos in france it would be better to find players who fit their style especially looking for younger ones would be much better than continuing to nurture old players who already have a name but whose era is almost over.