>One can remove DRM for amazon's ebook format (.azw3 ?) via some python scripts. You didn't hear it from me though.
Not for the new KFX format. Only way to get around that is to use an older version of the kindle desktop app that downloads the azw format. Workaround won't last long though. And won't work on newer macs because the old version is a 32bit app .
Last I checked (a year ago?) KFX wasn't a great input format, as it's optimized for the Kindle readers and not for conversion/interoperability. That is, KFX is to AZW3 as PDF is to HTML.
Sure, but if the book you're looking for is only available on Kindle and your eReader is not a Kindle, then the conversion is better than nothing.
I've found some O'Reilly ebooks only available on amazon in the format "Kindle Edition" (ie. KFX). Pretty aggressive market strategy from amazon given EPUB3 is the technical standard, but there you have it.
On my Amazon account, I can download my purchased books as AZW3 from the following page: https://www.amazon.com/hz/mycd/myx ('Manage Your Content and Devices'). (As I understand it, AZW3 is mostly the same thing as EPUB3.)
(Either that, or the files I download from there aren't actually AZW3 files but just KFX files with an .azw3 extension.)
Not for the new KFX format. Only way to get around that is to use an older version of the kindle desktop app that downloads the azw format. Workaround won't last long though. And won't work on newer macs because the old version is a 32bit app .