Their team is still very young - Dembele, Ruiz and Marquinhos are about the oldest. Pacho, Neves, Hakimi, Mendes, Vitinha, Kvara, Doue, Barcola, Zaire-Emery etc are all either very young guys or right in the middle of their prime or approaching it.
You'd imagine if Enrique wants to build a legacy there they will grow together and create a dynasty.
I guess the main thing is will they get bored with the lack of domestic competition? I am one of those who respects the clubs in France more than many, but there's no doubt that PSG are likely to win Ligue 1 every season and will receive little credit for doing do - so every season it's all or nothing on the CL and it's impossible to win that every year.
Maybe Neves at some point would like the challenge and eyeballs of the PL. But I think that would be far into the future. He's only 22 in a few months and can play there for another 5 or 6 years and still be at his peak. Scary stuff.