I bought a kobo years ago, never updated it, never connected it to wifi, never bought a book for it, just download epubs and write them to it via calibre
I do the same with a Kindle. Also jailbroke it and made it so it won't auto-update in case I do ever accidentally turn the wi-fi back on.
I do the same with a Kindle. Also jailbroke it and made it so it won't auto-update in case I do ever accidentally turn the wi-fi back on.