I think Lukaku's decision to stay in Serie A was a good decision. Lukaku performed very well in Serie A and maybe it is because Lukaku has a playing character that suits Serie A. I see that Lukaku cannot perform well in the English league with Chelsea. Although to be honest, I think Lukaku is the player who wastes the most chances. But he has a very strong physique which allows him to break down the opponent's defense. I think Chelsea should consider giving Lukaku to Napoli because it will be difficult for Lukaku to compete in the English league and that will be a loss for Chelsea.
With Inter Milan Lukaku played well but after he returned to Chelsea returned badly after that went to Rome the same appearance never amazed again because it was an old age factor 31 years he has a large body this is not a little agile because of his burly posture but in my opinion this slows down a little as an attacker.
Maybe Conte wants Lukaku for other reasons, so far only news that is not yet valid but there is still a possibility that he stays in Serie A and soon joins Napoli.
To be honest, my own opinion is not so sure Lukaku will perform well again.