Why do we use DeDRM tools or equivalent? to be able to move a file from one ereader to another, from another brand; to feel that we "own" ebooks we have "bought"; to be sure that we keep ebooks in case the booksellers goes off-market; to be able to give and ebook we bought to a few friends.

What does kindle and other proprietary DRMs offer? none of it.

What do companies adopting Readium LCP offer? all of the above.

The original https://github.com/apprenticeharper/DeDRM_tools is still open, everybody can use it, Amazon, Adobe, B&N, Kobo don't bother, so it can be used, updated without bits of Readium LCP. LCP which is moving in the right direction IMO: being able to give an ebook to a friend by simply giving the password is great.

Plus, why do some people want to keep and share with the world ebooks they had for free from a public library: they totally crush the only solution which makes litterature available to everyone: if this spreads, libraries will not be able to get ebooks from major publishers anymore. Is it what they really want?