This is purely hypothetical, just for fun. In this scenario, you don’t get to know who the GM is in advance, but they do have to run it as written. The players can leave whenever they like, but the GM has to stay until either all players leave or the players beat the dungeon.
A massive procedural dungeon with tons of mechanics, in a format that makes it hard to find info would be a nightmare.
Funnily enough, I’ve been on a huuuge random table kick lately, and running games like Trophy Dark with tables has been so much fun.