Downgrade a Verizon Google Pixel Phone to older versions? I'm planning to buy a Google Pixel off ebay.

Does the Verizon Google Pixel allow downgrading of software?

I like to try older &amp; newer versions for development purposes?
I would suggest not purchasing a Verizon Pixel if looking for a unlocked bootloader. I think since around December Verizon has pushed out updates that make it imposdible to unlock. Everything I've read says there's no way to unlock them if updated, and most of them have been.

I own a Verizon Pixel and was so sure I did not want to root...