YMMV / Supernatural S 05 E 04 The End

• Fanfic Fuel: There is an entire subgenre of fan fiction taking place in the Bad Future, with plenty of Dean/Future!Cas, Future!Dean/Future!Cas, Dean/Future!Dean, Dean/Samifer...and so forth.
• Harsher in Hindsight:
  • Bobby isn't seen in 2014, and it's implied he's dead. Fast forward to "Death's Door"...
  • If Bad Future!Dean thought his 2014 was bad, learning about what happens to him during the actual 2014 would've probably broken him...
  • As bad as the Bad Future in this episode is, Season 12 reveals that it could have been even worse again if Michael had won instead of Lucifer.
  • It's revealed that the reason why Bad Future!Dean is so jaded and broken is because Sam said "yes" to Lucifer. In Season 13's finale, Dean ends up doing the same thing with Michael.
  • Given what we find out in "Abandon All Hope", future Dean's plan wouldn't have worked anyway, as the Colt can't kill Lucifer.
• Hilarious in Hindsight:
  • Chuck cowering in fear from Dean's angry girlfriend. Turns out even God fears a Woman Scorned!
  • Chuck's advice about hoarding toilet paper is funnier in light of the 2020 Covid-19 pandemic and hoarding that ensued. Bonus points for the fact that the apocalypse in this episode is also chiefly fueled by a viral pandemic.
• Ho Yay:
  • When Dean tells Sam why they can't be together, it sounds a lot like a breakup.
  • Our manly hero Dean enjoyed wearing ladies underwear.
  • Future!Castiel's "that's how I roll" speech was originally about how his relationship with Dean was the only thing that kept him going, and he was entirely willing to go on a suicide mission if that's how Dean wanted to go out. Instead Cas is going on about losing himself in women and decadence.
  • Dean/Castiel dialogue from this episode appears in "Fan Fiction", in which their Homoerotic Subtext is lampshaded.