Too little too late, already ditched the whole ecosystem after so many years and devices.

Same here.

Switched to a Boox, installed koreader, set up sync thing. It's insane how much better a reading experience this is

The only previous option was not paying for books. This change at least creates the potential for a path to pay for books, if publishers accept it.

No, these publishers were already available DRM-free from other stores.

Same. I'm done.

Yep, never again. I tried to take a pragmatic position with the DRM, and it is just not possible. I buy the crap out of DRM free stuff, but if it's not DRM free, it's not for me