In such a scenario, maybe it would be a good idea to keep a backup of all your Kindle titles on your PC or a compatible storage medium while Amazon is still hanging on with the AZW format. Once everything is transitioned to the KFX format, it could become impossible to break the DRM.

I agree, and this is another example of hostile behavior toward the consumer. I have older Kindles that can’t (or I won’t) connect to WiFi but work fine for reading. If the books that I buy, not borrow, are locked out then why would I buy any more of them from these guys?