Barcelona is like a new home for Lewandowski, he is very comfortable with the situation at Barcelona which allows him to immediately adapt to the style of play used by Xavi. Lewandowski can still be relied on even though he is already 34 years old, he managed to bring Barcelona to win Laliga and won the top scorer in his first season.
Lewandowski period at Barcelona has just begun, he won't be leaving Barcelona any time soon, especially since Xavi still needs his energy to win several prestigious trophies next season. Barcelona will appear in the Champions League with the status as Laliga champions, need new resources to be able to compete with other strong teams, Xavi will be very busy in the transfer market to bring in several players so that his squad is stronger than this season, moreover he has just lost an important player Busquets and Alba.
There is no reason for Lewandowski to leave Barcelona because he personally feel comfortable to playing at this team and i think he will staying at Barcelona until his contract ended and Lewandowski has been proven to us that he can playing everywhere that he doesn't required long time to adapt with Barcelona and although his goals records still a bit less compared to when he was playing at Bayern Munich but so far Lewandowski is the best striker owned by Barcelona and 33 goals during this season has been make him as Barcelona top scorer and i am sure he will resumes to performing well for next season and currently he is 34 years old but i think he still can performing well for at least for next 1 or 2 season but a bit worried for Barcelona because they have several forward players such as Dembele, Ansu Fati or Raphinha but only Lewandowski who able to performing well
Lewandowski plays one of the special roles in the Barcelona team. He joined the Barcelona team and helped the team achieve great things in an impossible way. Next season this player will help the Barcelona team tremendously to do something great in the Champions League.