In my opinion, Lukaku is no longer as sharp as he used to be, but as an old striker, of course he is still very deadly if he is in front of the opponent's goal all this time, his removal from the Chelsea main squad indicates that Lukaku is no longer able to compete with the current young attackers, besides that Lukaku in my opinion no longer has speed, especially now that it seems that Lukaku has a fat enough body that makes it difficult for him to move or Breaking away from a tough defender, but even so it seems that the Italian league is a league that he can overcome easily because we don't see a fast game like the English League, so I think for now maybe he is still very capable to be the mainstay of Napoli but I hope Napoli don't expect too much from Lukaku.
Lukaku might be can recognized as flop player in Chelsea because on that team Lukaku never able to playing consistent but in my opinion when loaned to Inter Milan and Roma Lukaku performance is quite impressive even in Roma he is top scorer of this team on Europa league so what i want to says is Lukaku is suitable to playing in Serie A and everytime he was playing at this competition although with different clubs but his performance is quite stable so might be this is the main factor why Conte want him instead of Osimhen
Lukaku has just make his debut with Napoli and he can scored and bringing Napoli to beat Parma and i think this is good start for him especially after Osimhen didn't including to Napoli squad of this season and loaned to Galatasaray then Napoli hasn't have sharp striker and probably Lukaku can solved the attacking lines of Napoli