Unless you have issues for a while now Nvidia have said its good enough to use Experience to simply update.
The clean install option has always been there but for a good few builds but now it has changed in that it claims to delete all signs of old drivers.
If you install through G-Force Experience they go here : C:\Program Files\NVIDIA Corporation\Installer2 < you can delete this folders CONTENTS (I would keep the folder) after installation unless you want to keep for reinstall without G-Force Experience having to download them again, saves space on SSD IMO as can get quiet large over time.
I'm keeping it aside for new card to arrive as I will do a DDU run to swap them and stop Windows 10 updating to its drivers before I get a chance to do anything.
I am on a clean install of Win 10 Fall Update as of last night.
A word of warming, the past 2 drivers (and I gather this driver also and onwards) by design will not install if you have a modded GPU Bios that is too large, I cannot use on my Titan XM due to this without flashing back.