After watching Inter this season I think the other teams will really need to make a huge progress this summer. 
Because the gap is just enormous now. Maybe you will say Napoli were also like this in the prior season and failed later on. However Spalletti left the team which caused big problems to start for Napoli right after.
There isn't such thing for Inter. They are moving on with Simone Inzaghi. I believe they have the best squad in the league at the same time. In this situation it wouldn't be seeing them winning a back-to-back title unless we see some reaction from another team.
Because the gap is just enormous now. Maybe you will say Napoli were also like this in the prior season and failed later on. However Spalletti left the team which caused big problems to start for Napoli right after.There isn't such thing for Inter. They are moving on with Simone Inzaghi. I believe they have the best squad in the league at the same time. In this situation it wouldn't be seeing them winning a back-to-back title unless we see some reaction from another team.
Inter Milan are very to have a good coach like Simone Inzaghi, he stands up for the team and makes sure he brings out the good performances from the players, inter Milan won the league title without any stress because they are leading the remaining teams with a lot of points that no any other team can compete with them, and with the way inter Milan performance stands now they are capable of winning the league title next season, inter Milan is very happy with their players and the coach performance and they don’t want to lose any of them that is why they want them to sign a new contract for another year so that the future of the team will be very good and end well.
And about Napoli, since Napoli let Spalleti leave the club and sign a new coach I have been saying that it will be very difficult for Napoli to end the season with a good result, they didn’t even end up in playing the Champions League, Europa League or Europa conference league next season, this show that Spalleti is the best coach that can handle Napoli but the team doesn’t think before letting him go, it will be very difficult for Napoli to bounce back with their normal performance and with the way Napoli looks some players will also leave the team.