Most people who buy kindles don't read up on news about kindle or sideloading, or anything like that. They buy it for books, read the books, delete the books, then buy more. Kindles aren't really for the super techie crowd. They are for the moms who want to read some fun fantasy and stuff. They don't take it seriously.
Lemmy takes shit way too seriously. The real world isn't like Lemmy at all.
Having said that, I wouldn't buy a new Kindle, but I know how dominant they are. I also still they think they are strong devices. But I don't buy books with DRM.