Out of interest, I pulled out out an old NOOK Glowlight Plus 6 inch model: BNRV510. I had KOReader and some foreign language books on it and occasionally connected to Wi-Fi to use the translation feature in KOReader, feeling safe that I didn't need to root this thing because it was no longer being updated.
Apparently, what is on their website about 5.5 not being updated is a lie:
https://help.barnesandnoble.com/hc/e...evice-Statuses
They
added a USB Mode prompt and broke the ability to connect over MTP like I had been doing for the Macs in the house for a decade; Windows works okay to connect over the USB Mode, but you cannot add anything. I am assuming they also removed all the non-royalty-free fonts like Georgia et al, too?
Hate to say it, but I hope they just shut Nook down and sell it to someone who does not hate their customers.


