I also think so if it seems that this season Napoli will end with a trophy, but actually the real challenge of Naples is in the second half of the season later, because I see many Italian teams that were initially quite consistent and even managed to become champions in the half of the season, but they were not able to maintain the consistency of their game , so that towards the end of the season they were thrown out of the championship track, as happened to AC Milan last season.
this is what napoli have to think about today how they have to stay consistent in every game.
because according to what you said, sometimes a team is so consistent in the beginning but when they want to face the middle of the season their performance will decline and vice versa, some of their performances are bad at the beginning of the season but after the middle of the season to the end of the season will be consistent.
Their strategy must be really mature, not only to face the game but also in maintaining the condition of the players, the rotation of players so as not to fatigue and the relationship between players and coaches must be maintained
Maybe not only in Serie A the curse of the team that won the half of the season but failed to win at the end of the season happens, in several other European competitions we often see if the team that appears dominant in the begin of the season but fails to win the trophy at the end of the season, and I hope Napoli will be able to break the curse, it's true as you say and this is where the role of the coach is needed to be able to manage their squad rotation properly, but actually January can be an opportunity for a club, especially Napoli to improve their squad by adding some new players, so that every rotation of the squad is done will certainly be able to maintain the balance of their squad.