Not really, when you consider that there are tens of thousands of USB devices that work with Windows, many of which can operate like a flash drive even though they aren't (like cameras). I can imagine MS disabling this feature by default due to the headaches involved.

Notably, autolaunching USB drives is also no longer the default option for USB devices. The user has to specifically choose what action happens when the device is first plugged in (and by default, that choice only applies to the current instance; the user must manually choose to have the choice apply the next time the device is plugged in).