A similar thing happened to me with the Calibre editor. There is a very nice feature for group searches: using the top line field, you can summon a group using only some few letters. It's quite fluid and, one you know about it, you wonder how you could do without.
Well, I just "discovered" it reading an offhand Kovid's comment and it had been there for quite a long time too...
To come back to your last comment, I find it surprising (but of course it's your choice). I do not think that the fact that book view has been placed here for ages justifies keeping it in such a prominent position as long as you recommend a better solution.
Book view, at least in your eyes if not yet de facto, is
dead or about to die. Why let a corpse keep the front seat?