I picked up the AirPods Max last month, in February, same $449. Just low enough for me to say, "I'll get them." It took me a couple of weeks to get used to them, controlling them and adjusting things. I'd kind of like Apple to give you a AirPods Max app. But anyway, it takes a while for them to get to know you. They take echo readings off your ears, and you play with the capabilities of you finding the sweet spot. Until I started adjusting, I liked the ATMOS, but I missed some of the Beats' bass. It sounded metallic from the aluminum. I have the special, you know, wire, to plug into a sound source without the use of bluetooth!
The best thing is its noise reduction and the Spatial Audio. I love it. I just lets me listen to all of the instruments. Harmonies and counterpoints sound like parts I can differentiate. I can listen to harmonies in my favorite songs, and be able to focus on the tenor and the bass as well as the lead. I can also softly sing along, find a key, and sing harmony myself. Channels have been turned into three-dimensional images of sound. They're playing tricks on your brain, but my brain really likes it.
The AirPods Max aren't headphones in the normal sense. I'd call them something like the iPhone camera, which is like a point-and-shoot camera with a big computer attached.
Oh, and there are still problems in keeping them paired. I have gotten sounds from them like a computer crashing at times. And sometimes, just putting them on your head doesn't really pair them at all. On the Mac, I hear the chime. I then have to check on the Bluetooth menu. The image of the Max should be "live". Then I check the Sound panel, to make sure it's going to play on headphones and not blare over the speakers. Why not just be like the iPhone? Put the headphone near the computer, and a panel comes up...