This is correct. My answer is simply to not buy any Kindle books. In the future, I may buy some again if I can strip DRM.
Is there a place that sells ebooks that with easily strippable DRM?
At this point I think Apple’s really the only candidate for it. Everyone else is either helped by DRM (Amazon, B&N, Kobo), too small, or just don’t seem like a good fit (Google). I was hoping they’d do it after doing so with music, but at this point I’ve given up.
So what happened afterwards?
Deutsche Telekom sold the infrastructure to Rakuten, the Japanese owners of Kobo , in 2017. Interestingly, 6 years later, Tolino still exists with the same DRM-free architecture and new devices are actually developed by Rakuten.