I don't say we need to produce top players, just decent players to help us rotate in Serie A games. For example, the Nacho, Vasquez of Real, or kinds of Sergi Roberto in Barca, or Mc Tomminay or whatever in MU, some young Chelsea players.
As for top players, in the last ten years, we have seen Mueller, Alaba, Kroos from Bayern, Carvahal from Real, TAA from Liverpool, Thiago Alcatara from Barca. For lesser players with potential to be good, there is kinds of Rashford from MU, ... Even Inter have someone like Zaniolo (even though they waste him on Naiggolan transfer), Milan has Dounarouma, or someone decent like Locatelli.