Okay, a specific question that's been bugging me... I installed Windows 10 9926 via clean install from ISO, after deleting all partitions and operating from a bare drive. Following the install, I had no devices that weren't recognized in Device Manager, and no hardware-related functionality that didn't seem to be working. So, I saw no need to install the SP3 driver pack from January.
I see that other folks _did_ install the driver pack. Was this because drivers actually weren't installed along with Windows 10 and the driver pack was necessary? Or was that just a default action? I'm wondering if I'm missing something because I didn't install the driver pack (perhaps that's why the 1/27/2015 hardware update didn't take on my machine, or somesuch)? Any insights appreciated.