I just wanna leave this information here, which I only found out after I commented on the review, but that struck me as incredibly logical in hindsight - that the writer of this episode has only written a couple more overall for the show and one of them was... Scoobynatural (because he apparently also used to be a writer for Scooby in some form or fashion?), AND he said that when he first got the gig, he went through the show bible with a fine tooth comb and watched seminal episodes to get a feel for the show and cater to the things that were important to fans. Which... just about explains this whole episode from the ground up.

And now I'mma go have a good cry about the fact that this is the last nostalgic Winchester family episode we're ever going to get, which I thought too when I saw the synopsis but it hit me again and hard just now.