Luckily Manchester City managed to get Erling Haaland because his presence can make progress for Manchester City and it has been seen that his contribution there is very much because so far Erling Haaland has scored 12 goals in eight matches that have taken place, so this is really a great achievement for the club. Erling Haaland early in his career at Manchester City.
They know what they need to have in order to improve their quality. They have good capability to control matches with dominating ball possession and they also manage to create lot of opportunities. They did play without a real or top striker in last few seasons. Haaland is a player who can help them to solve that issue. With Haaland, Manchester City can finalize their ball possession and opportunities to more goals.
More important, with Haaland they have another approach to break defense of clubs that only want to play with a serious defensive bus to protect their goalkeeper.
Lastly with Haaland, they will have a talented player who can play for them more than 10 years. It's an important reason they rejected to sign a contract with Ronaldo in the past season and waited patiently to get Haaland.
Considering Haaland and saying that he can perform well for them for more than 10 years might be looking forward a bit too far. Because the first reason why he is even on the team is they want to win the Champions League title. You know, they are already the winners of the English Premier League title. That's why the bar of quality and expectation is a lot higher than Manchester City.
So if they are able to get better performances, and by getting better performances I mean winning the Champions League, then I think Haaland is going to stay in the team for a long time but if they are not able to achieve those things I don't think he is able to stay for longer.