So as an update: I am trying to stop using Kindle. As a test, two weeks ago I bought a comic from Kobo. I am still trying to read it on my Android tablet. The Kobo app has a problem with flickering white when changing pages with this one comic. Theoretically you can transfer Kobo books to other readers, but neither Pocketbook nor the Adobe Digital Editions app for Android can open the file. My current theory is these apps use an older version of the Adobe DRM than the Kobo ascm files.