AC Milan played at home and also after the big changes this season, AC Milan's strength is much better compared to last season so I think it's not a big surprise for the victory that AC Milan managed to achieve over Napoli, it's very normal in my opinion.
This is a match between two top Serie A teams so a lot of things are different, and that was clear to see.
The competition in Serie A this season is much fiercer than last season, and this is not only evident in the AC Milan vs. Napoli match, but also in the current standings, where five top teams are in order from first to fifth place, with three of them tied on points. This proves that Napoli isn't the only strong team this season; Roma, Juventus, Milan, and Inter Milan are also among the strong teams. The spectacle will continue to be very exciting as the top five teams compete for victory in the upcoming matches.