My 4th gen doesnt need it. I’ve got two D01100 models. I can literally plug them into my phone and copy paste books onto them. I google the book i want, download to my phone and just paste it into my kindke.

Just don’t attach an account to it and keep it on airplane mode. They can’t stop anything. I’ve even got manga on it but that took a converter program on my laptop to make the manga into an epub file.