Just today I noticed how Android Oreo (8.1) on my Nexus 6P can actually see my Bluetooth headset's remaining battery capacity. I didn't even know that my headset could send out this information! Windows never presented this information to me, and neither did my tablet which runs Nougat 7.0. Apparently there's multiple implementations of that battery level reporting too.. so lack of support in Microsoft's driver makes sense. Especially given that the Bluetooth standard already counts several thousands of pages. Compare that to Wi-Fi which is far more complex (with - some of - its 7 OSI layers, 2.4GHz and 5GHz frequencies, MIMO etc) which counts only 400-ish pages. I'm surprised that Google actually supports this Bluetooth battery reporting at all.. implementing all the standards must've been quite the chore.

TL; DR: Bluetooth is an overengineered piece of shit, and is in dire need of refactoring.

Disclaimer: This is not a Windows hate rant as this problem has been solved by Microsoft(partially).

I went to a hackathon last year at an engineering college. It was not such grand hackathon as people have in USA or Europe. So I entered in this competition trying to develop a medical app which asks the user detail about his/her problems then asks questions to match the symptoms of diseases. So me and a guy(who isn't a coder) tried to develop that app. He provided the data of diseases, I tried to develop kind of AI app with those data but found that job too hard for one day hackathon. So I wrote an email for api medic for their api which I was going to use. I then coded continuously for 4 hours in Android studio for the android app. The event manager told us late in the day that repo had been made for the hackathon and we must push our codes before 12 that night. The event manager provided the repo very late that day maybe around 6. I did a big mistake not creating my own repo on github to save every code I had written from time to time.(After this e vent whatever I code I save it in a repo). I was running Windows 10 on one of my laptop and ubuntu on my another. Due to some divine badluck I was using my Windows 10 laptop on that hackathon. So around maybe 10 I was about to wrap up the day push the code to repo. I went to getself a cup of coffee and returned to find lo and behold fucking BSOD. I was fucked, it was my first hackathon so made another misatake of using emulator rather than my android phone. My Android phone was not responding good that day so I used the android emulator.

From that day on I do three things:
1. Always push my projects to github repo.
2. Use android phone after running some minor tests on emulator.
3. Never use windows(Happy arch user till eternity.)

You might be thinking even though BSOD, it can be recovered. But didn't happen in my case, the windows revert back to the time I had just upgraded from Windows 8.1 to 10.