At least it's not Android, either. I don't use Windows, but for me the Android OTA upgrade to Oreo on my Nexus 6P has been disastrous for use with the QC35s. I have to reboot the awful thing several times a day to get consistent BT audio, and it will happily chew through the battery several times a day too, unless I leave it on charge for periods. Been with Android since the G1, but I'm seriously thinking about switching to iOS because I'm just so frustrated on a daily basis with this awful release, which seems barely tested. I do wonder at which point I switched from the optimist's "oh yay, an update!" to the pessimist's "oh shit, here comes a boatload of careless regressions".

FWIW, I just got rid of my wireless keyboard and mouse because I was tired of weird random connecting issues with my Macbook.

Thats the problem with Windows - it still does not carry a decent Bluetooth stack and depends on the vendor shipping one. And all of them I have seen so far are more or less crap.

Linux on the other hand is exclusively Bluez which works fine... but god forbid you want to do something like BLE communications or more complex sound stuff, the docs are horrid.

The OS X BT stack is... well I dont have any issues with it per se but it, too, lacks features like a file explorer or an easy way to send files via BT.