Sony has finally released the WH-1000XM4, almost two years after it released its last edition in the WH-1000XM series. Little has changed from the WH-1000XM3 and WH-1000XM4 save for a few new features. Battery life remains at 30 hours with NC on and the new model has the same 40 mm neodymium drivers. Bluetooth 5.0 is now supported, but aptX and aptX HD have been dropped.
https://www.notebookcheck.net/Sony-finally-releases-the-WH-1000XM4-almost-two-years-on-from-the-WH-1000XM3.484333.0.html
Still no weather proofing?! This is a meh release thats good for those without the m3, but otherwise it's not worth the upgrade
The only thing I need that 3 doesn't have is decent calling quality. Hopefully they've fixed that. Let's see the reviews.