Just to balance the anecdotes, I've had both input and output from a Bluetooth headset work in Windows XP, Vista, 7, 8, and 10, OSX Mountain Lion through macOS Mojave, and various Linux distros.

Yes, but the very fact that this needs to be said proves how bad BT is, really. In what other connection type would it ever be stated that somebody actually managed to get it working all the way?

I have had it work on multiple hardware, software and headset combinations over the past 15 years, perhaps you just had a bad combo?

I use my AirPods everyday for input and output on macOS and it works fine for me.

I use my AirPods everyday for input and output on macOS and it sometimes connects, sometimes fails, sometimes I need to reboot the laptop to make it work.

The main problem with AirPods seems to be that they don't make sound because of BT failure. Apple could have missed this detail.