Lucky them that Napoli was dropping points already or otherwise they would be miles behind in the table despite not losing any games. Next stop is Aston Villa for them and it is probably not going to be another draw without goals.
Yes, the gap between Milan and Juventus is quite a lot from the teams at the top. It's just that for Serie A, the competition is very tight. In fact, the points of the clubs from top 1 to 5 are only 1 point different and even exactly the same. So every match in Serie A is very influential on their next position. They must be much more vigilant with this one condition.
Indeed very tight as most of the top teams win their games nonstop or at least they don't lose them. Lazio has been doing amazing and so has Atalanta, Inter and Fiorentia, which is probably the biggest surprise of them all as I rather saw them further down the table. But anyway they are all playing their best and the results are on point, which makes Serie A interesting to follow these days. But let's see who will first have a real break in their winning streak (or not losing streak for that matter), but so far they all look strong.