If there was ever a time for Supernatural to change their minds and accept the fans' way of writing Castiel's nickname, season 15 offers the final opportunity to do so. Instead, the writers have doubled down on the double-S nickname, proving once and for all that "Cass" is the way to go.
While Dean does not reciprocate this declaration of love in the American version of the episode, a Spanish dub has Dean respond, "Yo a ti, Cas," or "And I you, Cas." At the time, no one from the series or The CW had responded, and some fans saw this as another example of LGBTQ+ content being censored on the series.