For those who think Kaido got massively stronger after his 40's

Fujitora and Ryokugyu vs Kaido, King, and Queen, which side would win? - Quora

I'm calling it. Roger easily defeated Kaido here. That's why Kaido put him in his top 5 list : r/OnePiecePowerScaling

Kaido goes through 95% of Wano arc the exact same way, except this time Luffy dies for real from CP0's interference. Kizaru randomly appears and replaces Luffy. What happens? : r/OnePiecePowerScaling

Debunking the “kaido was massively fatigued” take : r/OnePiecePowerScaling

Friendly reminder that almost all the evidence points towards Kaido being the strongest Yonko, and fighter, of this era. Kaido>Mihawk. Kaido>Shanks : r/OnePiecePowerScaling

There is no noticeable gap between Big Mom and Kaido : r/OnePiecePowerScaling

Who is stronger out of Shanks, Kaido, Big Mom, and Akainu? - Quora

Kaido didn't get magically stronger from sitting in his castle doing nothing, Oden would still give him a difficult fight. : r/OnePiecePowerScaling

Ignia vs Kaido - Battles - Comic Vine

Debunking the “kaido was massively fatigued” take : r/OnePiecePowerScaling

Do you think Luffy can defeat Kaido, seeing how powerful he is? - Quora