He's also on his way to be FI Luffy and Zoro level
post wano Zoro and post wano sanji are close in strength
dressrossa Zoro and sanji are close in strength Zoro showed nothing that he would do better then sanji against doffy
and g4 Luffy stomps both Zoro and sanji in dressrossa.
I always roll my eyes at the attempts to deny this by going well sanji took an l this one time while Zoro had this cool feat ( bringing up his win against pica) when that doesn't refute what I said neither did Zoro being on the rooftop not sanji who went to save a girl ( it was a similar scenario to enies lobby)
Zoro got kicked off the yonko fight like killer did
and after a Regen drug fought king who is relative to queen who sanji destroyed after solving his mental crisis and only used up stamina due to countering invisibility.
( but he scarred kaido doesn't change that Zoro and sanji are close in strength where any fight is extreme diff ( Zoro unconsciously used acoc to scar kaido in a tiny scar but he survived the combined yonko attack one second before he was saved byh law did Zoro help out the rest of the team but that doesn't put Zoro above law and kid