but if Inter doesn't take advantage of having Lukaku to get everything out of him, Inter needs him, even though he is a somewhat veteran player, he has the Experience enough to do and perform in any team, I would say that Lukaku can give good results at least in two more years, if they return him to Chelsea it will be a waste of time, they will not put him in, and apart from that , Chelsea does not have a technical director that guarantees him a great victory , so in this aspect Lukaku for me the best thing is that he stays at Inter.
It is rumored that Inter will still bring Lukaku, who is currently back at Chelsea, but the costs might be burdensome for Inter because reportedly Chelsea have also received an offer from a Saudi club to sign Lukaku. As you said, even though Lukaku is a veteran, but yeah his ability is still worthy of being in Serie A, also playing for Inter is what this guy wants. By the way, now Inter Milan already has another striker, Marcus Thuram who is obtained for free, Inter Milan is really deepening the strength of their squad and I'm happy to see it.