G4 is worthless now, just like how G2/3 became worthless the second G4 was revealed.
Remember how G2/3 Luffy was getting tagged by just 1 biscuit soldier and couldn’t damage it at all, but G4 nearly one shotted said biscuit soldier?
G4 will look absolutely pathetic for the next few arcs. Maybe once G4 becomes nostalgic for Oda, he will redeem it a little bit in the final arc like how he redeemed G2/3 a little bit in Wano