They’ve been extremely fortunate. 9 times out of 10 the team at the top is never alone. They’ve been garbage the past 2 months. Typical Spalletti team - brilliant at the start then fade away as the season progresses, seen it with Roma too many times when he was there. Napoli are lucky of other teams inconsistencies.
It’s been a freak season in Serie A - I’ve never seen so many of the top teams get beaten by the fodder at the foot of the table. One of the most competitive seasons in decades and easily the best league in Europe this year. 5 Italian teams still in Europe confirms this.