It's rational fiction on Frozen. Cool, but characterisations are very much on the nose and progression is weird. Enjoyable short read though.

HPMOR, only for superman. Makes Lex Luthor out as a semi-sensible person.

This story has potential, but rationalists and their aversion to humour ruins it. The Last Christmas is a fun premise, but way too short to build it up properly, and so it ends up all over the place. Still: It's short, and a nice read, so if you want to see how an engineer deals with suddenly being Santa, go check it out.