This chapter is also already dehyping Kaido
> Orochi/Grandma/Grandpa dude were already working in the shadows to kill the previous Shogun and reduce Wano forces by removing their weapons and creating deadly factories when Oden left
> Orochi already established his power as the current Shogun with only leaving some forms of rebels left lacking weapons to fight
> Kaido still had to ally with Orochi(probably from the mysterious Grandma/Grandpa plot) when Oden came back
So basically Kaido only took advantage of multiple factors playing on his side to manage to rule Wano. If it was prime Wano like in Oden's days, he'd never have managed to have so many factors playing for him and thus would have been destroyed
> Orochi/Grandma/Grandpa dude were already working in the shadows to kill the previous Shogun and reduce Wano forces by removing their weapons and creating deadly factories when Oden left
> Orochi already established his power as the current Shogun with only leaving some forms of rebels left lacking weapons to fight
> Kaido still had to ally with Orochi(probably from the mysterious Grandma/Grandpa plot) when Oden came back
So basically Kaido only took advantage of multiple factors playing on his side to manage to rule Wano. If it was prime Wano like in Oden's days, he'd never have managed to have so many factors playing for him and thus would have been destroyed