[somehnguy]

Every single pair of ANC headphones I’ve owned from Sony to Bose (and now Apple) ends up having a dozen threads with people yelling not to update because the ANC is nerfed. I’ve never noticed any difference, and I highly doubt any of it is true. People just get used to the ANC and hear things differently than when they first bought them. Or like you said, crud in the microphones from daily use.