This is why I believe that the best thing for Italian teams is to build a young squad when they are at Serie B, that way they could get better as they go along, and if they go up, they are growing up, so they can stay better, older players may get success quickly, but won't keep it there.
Serie A teams will be far behind financially when compared to Premier League teams. Even so, the teams in Serie A are strong enough. Serie A teams qualify for the Champions League, Europa League, and Conference League finals. Despite not having many star players in the squad, Serie A teams are performing well. Serie A teams should build squads with young players if they are not financially sound enough. Forming a squad with young players will make it difficult to keep the team's performance consistent. But if the coach is experienced, it is possible to form a strong squad with young players.
However, despite their lesser financial strength when compared to other European big five leagues, Italian teams are still very good when comes to competing with other European clubs. How they've been doing that over the years is something I really f not understand