Imagine if Destiel became canon, but the writers waited till the very end of the series to do it. Like, literally in the absolute last episode, right before the big climax, Dean and Cas are leaning against the Impala, drinking beer. Then without looking up, Dean just says, “So, after this is over, you wanna go out?” and Cas barely twitches before responding, “Yeah, it’s about time,” and that’s the only mention of it ever.