I agreed with this point of view, having my entire library searchable & available while travelling was the selling point for me... until I received an email fro

I agreed with this point of view, having my entire library searchable & available while travelling was the selling point for me... until I received an email from Amazon saying my version of Kindle For Mac will stop working on September 15. And I can't run the new version, because the Macs I'm running Kindle on can't be upgraded beyond Mac OS X 10.7. I have plenty of other devices so I'm not (yet) locked out of my library, and those Macs can be converted to Windows 10 (which does run the latest Kindle software)... but it reminded me it isn't a forever library. I need to make non-DRM'd archive copies of all my digital books if I want to be able to use them for more than 4 to 5 years.