As for wired listening? My XM4s sound okay wired in, and at home I’ve got critical-listening kit already. Adding a USB-C cable to the Max is not appealing given that 3.5mm already exists, USB-C cables are heavier than analog audio wires, and more corps block USB ports in general or mess with them in ways that corrupts the audio stack.
Give me wireless CD-quality audio and I’ll be a happy dinosaur. Until then, I have zero reason to upgrade what I currently have.