It’s really just that only Amazon uses AZW3 and KFX. MOBI is deprecated, and nobody really uses it anymore, not even Amazon. KFX is DRMed to hell, and I’m not sure about it, but most AZW3 files are just DRM wrappers for EPUB anyway. This is why the KindleUnpack plugin for Calibre can strip out EPUBs from most AZW3 files and retain formatting without needing conversion.
Basically, AZW3 and KFX are for Kindle, and only for Kindle. EPUB is an open standard that literally every device that’s not a Kindle uses.
I already own a non-Amazon reader that’s my main reader, and I want to move away from Amazon’s ecosystem.
It’s really just that only Amazon uses AZW3 and KFX. MOBI is deprecated, and nobody really uses it anymore, not even Amazon. KFX is DRMed to hell, and I’m not sure about it, but most AZW3 files are just DRM wrappers for EPUB anyway. This is why the KindleUnpack plugin for Calibre can strip out EPUBs from most AZW3 files and retain formatting without needing conversion.
Basically, AZW3 and KFX are for Kindle, and only for Kindle. EPUB is an open standard that literally every device that’s not a Kindle uses.
I already own a non-Amazon reader that’s my main reader, and I want to move away from Amazon’s ecosystem.
Maybe I didnt read it properly when Calibre was sending it to my reader.
Regarding formats: As expected (Insert XKCD comic about standards)