User blog comment:KillRoy231/Lucifer in Season 13.../@comment-10889355-20170823105642/@comment-1031724-20170824005100

Either way, Season 13 may not have more to offer me and I might stop after Season 12.

You know why Crowley died? Coz Mark Sheppard got tired of Supernatural and left the show. Why? Coz it was going on for WAY too long. He was Crowley for eight seasons! Of course, Misha Collins was Castiel for nine, and Sam and Dean for the entire series, but soon Misha will leave too, meaning a permanent death for Castiel, unless this WAS his permanent death and we continue to see him in, wherever angels go when they die.