> the experience for managing any content bought/downloaded from outside Amazon is almost unusable
Not at all.
I buy EPUBs from all kinds of vendors, across multiple languages. I also have many downloaded from Standard Ebooks [0].
All EPUB works fine, and provides great experience- as long as a file does not contain one of the following- custom page illustrations, syntax highlighted code, graphs, charts, maps, math equations, color comicstrip etc.
Just use PDF in tablet or laptop for arxiv papers, math/programming books, etc.
Use Kindle for recreational reading- like novels, poetry, essays, etc. I am a huge fan of reading since basically learning to read. And I love Kindle! Am a user for last ~10 years.
Not at all.
I buy EPUBs from all kinds of vendors, across multiple languages. I also have many downloaded from Standard Ebooks [0].
All EPUB works fine, and provides great experience- as long as a file does not contain one of the following- custom page illustrations, syntax highlighted code, graphs, charts, maps, math equations, color comicstrip etc.
Just use PDF in tablet or laptop for arxiv papers, math/programming books, etc.
Use Kindle for recreational reading- like novels, poetry, essays, etc. I am a huge fan of reading since basically learning to read. And I love Kindle! Am a user for last ~10 years.
[0]: https://standardebooks.org