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