AC Milan is like downgrade their squad for letting their good players to leave. They already lost Ibrahimovic, Giroud will retire soon, they only have Hernandez, Leao, Tomori and Calabria, the other are just to complete the squad.
Losing some important players is a loss and it can't be denied. AC Milan condition could decline drastically in the next season, especially when the key players who have made a big contribution so far donate goals. Meanwhile, in Serie A, each club does not want to stagnate and will try to improve its performance. Leao needs a suitable partner but it's a shame whether AC Milan budget can recruit at least 1 or 2 players to remain a balance on the front lines.
The Saudi League is more like a show league. They don't seem like they aim to increase the quality of the league much more by starting to grow big names from their youth setup. The only thing they aim is to maintain this show by bringing mostly old stars to make supporters happy. They have oil money and they can easily make way better offers than a European team. This is all about the Saudi League.
For now, Arab players are not in great demand by leagues in Europe, because from the beginning the goal of Saudi Arabia was to increase the attractiveness of foreign players in terms of sponsorship business. Therefore they preferred to attract top European players to bring in more money. In addition, the most ideal strategy is investing in European clubs and little by little mastering it without you noticing it.