Inter not letting off anytime soon, and they are looking amazing. Looking at the table, while it's true that Atalanta is looking like they are leading, the gap between Atalanta and Inter is just three points, and we do have nothing to worry about with this current method neither, because they are lacking one game, meaning that if Inter wins that extra game then they would be tied with Atalanta as well. They are certainly looking like they could get a good win, and I believe that we shouldn't be really worried about it neither, it is possible that we could see them do quite well, and this is looking like it is going to be a great period for them.
I believe they will win the league this season, while there are few teams that look like they might, Inter is the only one with enough experience at the top, and eventually other teams will start to lose points some place during the season and Inter will take advantage of that using their experience to win.
Inter has managed to establish a very effective game system that has been formed in a few years, Inter is very good this year and they are currently getting very good results, they got them last year and they will get them this year because they make a difference compared to other teams.
Yeah, teams like Atalanta and Napoli are also good, Inter has not opened up the gap right now, Atalanta is ahead by a lot of games, as you have stated. These are important breaking points in the league, if they continue to get wins like the match where they scored 6 goals while other teams lost, Inter will break the resistance of other teams.