you might have extremely low temps, but even with a system like this, its not really viable for consumers, you just vent N2 gas off and once that tank is empty your buying another tank of LN2, those are about $1000 for a 50liter tank.
it might not run as cold, and have a higher initial cost (especially per liter price) but id much rather have two-phase immersion cooling gaming PC's, yeah it costs about $1500-$2000 to fill something the size of a gaming PC with Novec fluid, but you dont have to replace it, and while your not going to be running at -100, you'll have stable 50. you wont have to worry about losing a hand to severe frostbite if you need to repair your components and it keeps the entirety of submerged components dust free, and theres not any condensation to worry about because everything is submerged in the non-conductive fluid, and its not greasy like mineral oil bath PC's