I'm big fan of Sony products.
After upgrading from my 7-year-old WH-1000XM3, I immediately noticed comfort issues with the new WH-1000XM6. The ear pads feel warmer with less ventilation, and my ears heat up far quicker than they ever did with the XM3. The fit is also too snug — the clamping force is strong enough that I get a headache after about 15 minutes. Maybe it's because I have larger ears or wear glasses, but this was never an issue with the XM3.
The sound and ANC are phenomenal, but the overall comfort is a big step down for me, especially at this price point. I really wanted to keep the XM6, but after two weeks of regular use, the clamping force still hadn't eased up. Honestly, I wish could just repair my XM3s. They work fine, just the headband is taped up using duct tape becuase the plastic parts have cracked and sliding adjustments for the earcups no longer stay in place.
One day, I hope Sony releases a model that returns to the comfort of the XM3/XM4s, and with a decent mic that doesn't make you sound like you're talking through a walkie-talkie.