One of the things I am really pleased about is how low the noise floor is, even without the active noise canceling. The "acoustic" glass helps, but I would guess they did some other things with the chassis. We also have a Model X P90D and agree I wish it were quieter.
Do you have a decibel meter? Maybe on an apple watch? I'd be curious what readings you get. Our 2020 Model X usually registers road noise around 75 mph at about 70 dbs.