No but gudies on YouTube to do it without needing root
Never need to root to flash new images onto a Nexus
Just don't flash userdata.img & everything will be fine.
Don't even need to worry about that, download the OTA zip file and sideload it with the stock recovery.
Isn't that what he just said?
I thought Matteysan refered to the factory image and Rusty was saying it's even easier to flash the OTA (which wouldn't wipe data anyway).
Well, they're publicly accessible on Google's servers, as that's how the phones get them.