City is the only team that has consistently dominated for several seasons in a row, during which time only their rivals alternate, at one time Liverpool tried, now Arsenal tried for two seasons, but none of them manage to break City’s dominance and I think that they can’t will succeed in the near future, because Guardiola’s team is very strong. And despite the fact that some important players like Gundogan leave, he manages to be the best. For some reason it seems to me that Arteta will not be able to beat Guardiola.
Manchester City succeeded in building a strong foundation, so that they were able to maintain their performance for years, at least they managed to defend the title for 4 consecutive seasons. In my opinion, the foundation they created is one of the keys that has enabled them to be consistent so far, because without that foundation they would probably decline quickly.
We see a lot of teams that only last for 1 season, that's because they don't have a solid foundation so they can decline in a short time. We must not forget the genius of the coach, because Pep Guardiola is indeed a coach who is good at concocting strategies that he can apply well in his game. Manchester City also cannot be separated from their success, because management gave Pep Guardiola a long time.
For continuous success, a coach and his men will be together for long training and learning new skills to improve the team performance. Any club thy changes their coach as if they are changing the cloths that they are putting on will not get a good result most times, because football is not magic and it takes a gradual process to build the team and for the team to also understand the coach game strategy.
This has being the problem of some clubs in England. Look at Arsenal with Arteta, they are doing better and improving every season because they longer they stay together the best results they will get. Manchester city is successful because they understand this.