As of this writing I can still connect my kindle and then read the kfx file with Calibre and then convert it to azw3 or epub (with the dedrm plugin).
Should I loose every way to backup my books, then probably I'd use tesseract, puppeteer and their cloud reader to re-ocr the books (it's better than nothing). Also note that the country I live in, libraries have no ebooks. Kobo drm is another nuisance.
When I try to do this, it flatly doesn't work -- I get a popup message saying "This book has DRM". I have what I believe to be the latest version of the DeDRM plugin installed in Calibre.
(I am currently attempting to follow a recipe off the internet that begins with "install an old version of the PC Kindle app, disconnect from the internet before running it so you can tell it not to auto-update itself, ...". Perhaps that will work.)
[EDITED to add:] Yup, looks like that has worked, though most of the titles and authors will need to be entered manually.
I keep a file with details for myself that change every year, thanks to Amazon being a dick and I a moron for giving them money. I still use an older calibre version and a dedrm plugin fork, not the original.
Should I loose every way to backup my books, then probably I'd use tesseract, puppeteer and their cloud reader to re-ocr the books (it's better than nothing). Also note that the country I live in, libraries have no ebooks. Kobo drm is another nuisance.