I feel like I remember even in 2017 correspondence chess players in centaur-allowed matches had centaurs beating people who expected to just be able to set up a

I feel like I remember even in 2017 correspondence chess players in centaur-allowed matches had centaurs beating people who expected to just be able to set up a cluster and run an engine and copy its moves. And gwern's article seems to me pretty strong evidence that the best centaur players still held an edge in all the tournaments he listed. I am very curious to hear how that's still possible (or to learn that in fact it is now impossible), especially in the post Leela/Alpha world.