The fact that this also shuts off access to many public library Ebooks on these devices should be getting more press. My wife exclusively uses her Kindle for library books and it looks like it will be impossible to get legally acquired library books onto her device from our library system, which is using libby/overrdrive.

Just as well. Look at the contracts. Ebooks are draining our libraries of funds. It’s so much better for the library to borrow a physical book