There is so much mis information in this thread.
First please watch this actual hardcore overclocking video that explains a ton more about this potential issue.
Here are some other points:
1) POSCAP is a specific model of capacitor made by Panasonic so calling all SMD polymers as so is like calling all soda Coke, it’s incorrect.
2) MLCCs are not just universally good as well. Just like all capacitors they have several models that have different spec etc, so you can’t just say small is good and big is bad
3) power delivery is more than 1 component, you need to investigate the entire pcb to actually say if it’s good or not
MLCCs and SMD polymers each have different specs different things they are good at etc, the best you can do is mix and match to fit your board, which is what I believe EVGA has done.