According to a One Piece theory, Luffy overcoming Gear 5's weakness in Wano was Oda's way of paying tribute to the legend Akira Toriyama.
Luffy's Gear 5 is an extremely powerful ability ... Luffy had an incredibly high bounty of 500 million berries. Gaining half ...
One Piece is purposely holding Luffy back as his greatest power has one major issue and the manga must solve it.