From my understanding of the article, it sounds like ChromeOS support is getting pared back for those devices, but the devices themselves should still be supported, albeit via a (planned but not yet in existence) migration path to GooglebookOS.

Although tbh, I've not really used either in anger, so I can't really comment on if that is a raw deal or not. (Beyond the usual dislike of change that will always be encountered).

So agreed, that sounds reasonable.