seems to be difficult to shift Napoli at the top of the current standings. even in this season. because Napoli really have not shown a gap. they tend to be able to maintain the solidity of their game. for Atalanta then it could be that his position will soon be shifted by Milan. Because Milan are slowly starting to rediscover their best game. and indeed this season is still long. so we don't know what will happen from the start of the mid-season.
learn from history, usually a great club at the beginning of the season can be at the top but sometimes at the end of the season it drops in the middle of the standings, I admit Napoli have found a very good game so their club should not be underestimated too, but over time, clubs like Milan or Roma could have overtaken Napoli at the top of the table, no one knows how they will defend
their great game
That is still the job of the team that dominates at the start of the league, yes they must be able to maintain their stability in the game, otherwise like the previous season Napoli will again be thrown out of the competition for the Scudetto. I think it's a matter of mentality of those who are still not strong enough to face every pressure when they are top of the table. Or also they quickly complacent with what they achieved even though it was not the end of the competition.