The GOAT ranks have not changed much at all since 2016.
Anderson losing at 40+ years old doesn't affect his all time status. He was World Champ for like 6 years and had a record # of title defenses. Nothing can change that. It doesn't matter what happened after that. Legends fade out and decline in every sport. Not everybody retires at 32 like GSP. Some guys are warriors and will never stop trying, even if they are 40 and know they are past their primes.
GSP beating Bisping is a nice win (esp for a former WW after 4 year layoff) but certainly nothing to change GOAT ranks. His legacy was already secured by 2012. Bisping is one more win but let's not act like it was a real "World Title win" or put him in the same boat as the real Champ Champ Champs (guys like Fedor, Hendo, Nog, BJ Penn, DC, Cejudo) I love Bisping but he was not the world champ when be was refusing to fight guys like Romero, Jacare, Mousasi, Whittaker. The 1st Whittaker/Romero fight was the real MW title and all true fans know that