I have a Boox Palma 2 - their cellphone-sized thing that doesn’t have a cellular radio. I love it. They’re more expensive than kindles, though, since they’re not subsidizing their cost with ebook sales. I haven’t actually tried jailbreaking a kindle so I can’t say how good an experience that would be, but you could probably pick up a kindle of some description on the used market for dirt cheap to try it out.

Run software they don’t approve of. Like alternate reading apps that don’t need you to pipe everything through an Amazon account, read formats they don’t support, etc.

This is why I have an Android e-ink device. I can put the kindle app on it for anything from their shitty walled garden, but I also can put pretty much anything else I want on it too.

Honda is better off without them.