I cosplayed Ruby at Club Vivid and
luminosity commented that I was playing the dead femme fatale. I had to headtilt and remember that for the rest of fandom, yes, she is dead. But not for me, because I live in
another universe as far as Supernatural is concerned.
I happened to mention this
niqaeli, whose response was that, well, okay, the host body's kind of a walking corpse, but
Ruby isn't dead in any meaningful way, and how do we dissect the deadness of demontude. We were stopped at a red light so I let go of the wheel and took her hands and said, "No really, honey, she was stabbed with the demon-killing knife. As far as canon and most of fandom are concerned, she's really, really dead." And niq started cracking up because she had completely forgotten, as she also lives in another universe with regards to Supernatural, although hers involves the phrase "Ruby, the archangel" and Gabriel being an asshole for kicks.
In case you were wondering about
Olga, it's not like I didn't specifically go looking for all the blood and gore and demon-shooting and demon-stabbing and somehow I left out
that part of the season 4 finale, so I think it's safe to say she's
not dead either.
The funny thing is that there are shows for which fandom has declared Didn't Happen (see also: Richie Ryan, Alex Krycek, and Daniel Jackson, where the power of their denial combined with lack of regular work for a scifi-turned-serious actor combined to MAKE IT CANONICAL), but as far as we can tell, there
isn't any organized/widespread denial about Ruby. So hey. Put your hands up if Ruby lives on in your hearts, regardless of what may or may not have happened on the show.