That's interesting. I'd be a little concerned that widespread use of that might create more legal issues for Archive.org that wouldn't be problems if it never caught on much. On that basis, I'd probably not use it.
But I'd imagine ideological opposition to such a thing wouldn't be enough to keep it from catching on either.
pdf drm is already really easy to defeat (there’s online file converters that can do it in seconds), i agree on the rest tho i probably wouldn’t use it personally, libgen is great for anything academic and then for the rest, slsk has a surprising amount of books floating around