Disable always-on Windows 10 Wifi by:
- regedit: set to 0
- save battery by not having your computer connected to Wifi while sleeping.
- not connecting to possibly rogue AP as you travel about, or being subject to tracking.
- some hardware (e.g. Surface Pro 3) often fails to connect to Wifi on wakeup until manually going to Device Manager and disable/enable cycling the Wifi adapter.