Robert Lewandowski is of course one of the greatest strikers now. He is getting older but his performance improves more in time. I think that he is better than last season now for example. He can break a new goal record in the Bundesliga if he goes on like that. Bayern Munich are really lucky to have him but he seems likely to leave this summer also I think. Actually it will depend on the offers for him. If he gets a really satisfying offer from another big club, then maybe he would make a change in his life from now on.
Lewandowski is becoming old but he is still performing well. But you never can tell if he is playing his best for now. When ever a playing is getting old he does not need to be taking much risks again by leaving where he is to another place. He might not prosper in the new place he wants to go. If I were him I will remain in Bayern
Yes, staying at Bayern Munich for Lewandowski is the right choice, let his career end there. Because with his old age I will be worried about his fitness and also his performance if he moves to another big club, we will see how Messi and Ronaldo continue. They moved at an old age and they found it difficult to perform well at their new club, it was because of the different gameplay in each country and also many other factors which of course they had to be able to adapt from the beginning again.