I urge those who will be affected by this change to read a more complete description of what will happen in June 2024:
https://help.barnesandnoble.com/hc/e...f-Life-Devices
If the information there is accurate, this is not going to be like the NST-UK massacre. The devices will remain fully functional except for the purchase of new content or downloading of old content not present on the device (archived). WiFi will not be the "kiss-of-death".
The people most seriously affected are those who come late to the party and purchase a used device from ebay or similar. Those devices will not be able to use the stock reader, etc., except by bypassing OOBE. In the past, with contact with B&N servers not possible, this always led to shorter battery life. There is every reason to assume this will remain true.
The alternative for such folk would be to disable the B&N system and install their reader of choice, etc.
Because it will be impossible to fully recover a registered device that runs into trouble down the line, I recommend a full backup prior to June 2024.