I'm curious what you heard exactly. As far as I can tell, centaur chess looks completely dead.

Nobody ever wins anymore in the ICCF championships (which I believe is the most prestigious centaur chess venue, but am not sure).

This is not an exaggeration. See my comment from several months ago: https://news.ycombinator.com/item?id=45768948

As far as I can tell based on scanning forums, to the extent humans contribute anything to the centaur setup, it is entirely in hardware provisioning and allocating enough server time before matches for chess engines to do precomputation, rather than anything actually chess related, but I am unsure on this point.

I have heard anecdotally from non-serious players (and therefore I cannot be certain that this reflects sentiment at the highest levels although the ICCF results seem to back this up) that the only ways to lose in centaur chess at this point is to deviate from what the computer tells you to do, either intentionally or unintentionally by accidentally submitting the wrong move, or simply by being at a compute disadvantage.

I've got several previous comments on this because this is a topic that interests me a lot, but the two most topical here are the previous one and https://news.ycombinator.com/item?id=33022581.