I genuinely do not understand how anyone who enjoyed the first 8 seasons of the Simpsons could think that Armin Tanzanian is anything but hilarious.

And it’s barely a retcon. The only thing we knew about him before Principal and the Pauper that wasn’t true was his name. He’s still the principal that Bart has been screwing with for years, he’s still a Vietnam vet, he’s still strangely subservient to Agnes Skinner, he still a nerd who loves being a principal despite the fact he’s quite bad at it. And even his name stops being fake by the end of the episode, by court order.