The good news is that now the record Juventus of 102 points in a single season it will not possible to beat.
They have 71 points and 10 games for a max potential of 101 points.
The record will stay with the Juventus of Conte. (2015)
It's good for Juventus to keep their record one more season at least. However, if ignoring the record, this defeat of Napoli and also a win for AC Milan is bad for Juventus. They lose a good chance to reduce gap with AC Milan. In addition, AS Roma won against Sampdoria too and Juventus now have 6 points less than Inter Milan and AS Roma at fourth and fifth positions. Both clubs have 50 points totally while Juventus have only 44 points totally.
Champion Napoli was defeated at home this time. It was a shocking defeat for them, but it cannot be said that it affected them much in the standings. Milan played very well and got 3 very important points. Beating Napoli at their home was no easy task
This defeat is not harmful for Napoli chance to win Scudetto but it happened only 10 days before their first match with AC Milan in Champions League quarter final. I don't consider it is a good preparation for Napoli. This big win will help AC Milan to gain more confidence that they can beat Napoli and have their first season in Champions League semi-final after many years. Grande AC Milan likely are coming back in Champions League.
It is bad for Napoli as we don't know will they have Osimhen for a next match in Champions League. Without Osimhen, Kravatskhelia is less dangerous and Simeone simply failed to replace Osimhen.
Leao and Saelemaekers' goals were legendary. They scored as if the Napoli defense didn't exist. The champion team had the right to be defeated like this when they opened such a point difference, no one can say anything about that. They will face Milan in the Champions League, then they have no chance to play like that. They should learn from this game and prepare for the Champions League game.
In addition, Napoli defense players had a very bad match. After getting two conceded goals, they opened their goal for AC Milan players. This defeat remind me about a big defeat of Manchester United at Anfield weeks ago in Premier League.