I sometimes feel it has been all downhill since the keyboard kindle, and occasionally think I should get a new battery for mine.
These days I use a Paperwhite as my main reader, and I have an aging Kobo Touch for epubs and a similarly old Nook Simple Touch I haven't used for a good while. I abandoned the keyboard kindle when its battery just wasn't really lasting any more.
But yes, having one reader for each book does miss the point a bit.