Oh, I don't know. Could be the endless complaints about adding in a cook to a kitchen.
Or maybe the endless complaints about players trying to add things to the setting.
I mean, if improvisation is a critical skill for a sandbox and for simulation, then, suddenly, all those meta-game style mechanics are back on the table. What's the difference between "improvising" a cook in the kitchen and adding a cook to the kitchen because of a failed skill roll?
It's not about a "gotcha" moment. It's about the fact that the goalposts have been on roller skates all the way along.