Napoli did not make many major changes in its squad compared to other strong candidates so it is quite natural that they are still one of the strongest candidates for the scudetto and may be able to defend the title because if you look at Inter with Chivu for example, where Chivu cannot be said to be an experienced coach to manage a big team so I think he will have quite a hard time in Serie A later, maybe the most reliable to compete with Napoli is AC Milan.
I'm not sure you're missing something with Napoli, as they've been one of the most active teams in the transfer market so far. Napoli remains a strong contender for the Serie A title next season because they've been so enthusiastic about evaluating and bringing in a number of needed players. However I'm not so confident about Juventus or AC Milan's performance next season as a change in coach doesn't guarantee a significantly improved team.Napoli and Inter Milan are still strong contenders for the Serie A title next season, and I'm confident that even though Inter Milan is coached by the inexperienced Chivu, they have the ability to compete for the title. I'm not so sure about AC Milan, but being able to compete in the top five of the standings until the end of the season is already much better.
Juventus, Milan and Roma will simply fight for a Champions League spot.
Napoli did not make many major changes in its squad compared to other strong candidates so it is quite natural that they are still one of the strongest candidates for the scudetto and may be able to defend the title because if you look at Inter with Chivu for example, where Chivu cannot be said to be an experienced coach to manage a big team so I think he will have quite a hard time in Serie A later, maybe the most reliable to compete with Napoli is AC Milan.
I'm not sure you're missing something with Napoli, as they've been one of the most active teams in the transfer market so far. Napoli remains a strong contender for the Serie A title next season because they've been so enthusiastic about evaluating and bringing in a number of needed players. However I'm not so confident about Juventus or AC Milan's performance next season as a change in coach doesn't guarantee a significantly improved team.Napoli and Inter Milan are still strong contenders for the Serie A title next season, and I'm confident that even though Inter Milan is coached by the inexperienced Chivu, they have the ability to compete for the title. I'm not so sure about AC Milan, but being able to compete in the top five of the standings until the end of the season is already much better.
When it comes to my opinion, I'm uncertain between Napoli and Inter. Let's see what Chivu has to show us first. 
Judging by the odds on the betting market, Napoli is undoubtedly the favorite to win Serie A, having won twice in the last three seasons. I was just thinking about a new name, because from 2019/20 season until the last season, we always saw other teams becoming champions, and the previous champions couldn't maintain their legacy. If this pattern continues, then Napoli isn't a strong candidate, it could be Inter Milan or Juventus.Chivu is indeed inexperienced, and that's why many people doubt his future with Inter Milan. However, it's important to remember that Inter Milan's squad is quite strong across all areas, so Chivu could improve the team.
It's understandable that Napoli remains the favorite. In Conte's first season, they won the Scudetto, so it's natural that many people think they can improve next season.