I still own my voyage from 2014 era. Amazon forcing new formats is their choice. Deprecating old kindles is a choice. This is all about ending people's ability to remove DRM from books they bought.

I'll never own a kindle again. Does anyone know which platforms work with Calibre De-DRM? Or do we need to build a screen cap tool for transforming books to an open format?

I've had good luck with my Kobo, for those books bought through their store. (I strip DRM from everything I can, if I can't buy without in the first place.)

Kobo seems to be the current leader. You can also load KoReader and Tailscale on it