User blog comment:KillRoy231/Lucifer and Rowena (Season 12)/@comment-1975828-20161022071444/@comment-1975828-20161022172451

The thing with Crowley and Castiel is, they are TOO famous to kill off. If you remove either one of them now, or both, fans will be a lot more outraged. Ratings, sales and followers would drop considerably.

I know some people who watch the show just for Castiel, so....yeah, it's either keep the show or kill these two off.